| Class Number |
Class Name |
No. of Patents |
| 75/300 |
Compositions |
23 |
| 75/228 |
Consolidated metal powder compositions |
212 |
| 75/249 |
Base metal one or more of beryllium(be), magnesium(mg), or aluminum(al) |
221 |
| 75/250 |
Base metal is beryllium(be) only |
6 |
| 75/245 |
Base metal one or more transition metal |
290 |
| 75/248 |
Base metal confined to tungsten(w) |
140 |
| 75/246 |
Base metal one or more of iron group, copper(cu), or noble metal |
707 |
| 75/247 |
Base metal one or more of copper(cu) or noble metal |
201 |
| 75/229 |
Flake or fibrous constituent or fibrous grain structure |
121 |
| 75/230 |
With nonmetal constituent - silicon(si) considered a metal (e.g., cermet, etc.) |
227 |
| 75/236 |
Carbide containing |
334 |
| 75/240 |
Carbide only of chromium(cr), molybdenum(mo), or tungsten(w) |
275 |
| 75/239 |
Carbide only of vanadium(v), niobium(nb) or columbium(cb), or tantalum(ta) |
117 |
| 75/241 |
Carbon(c) associated with more than one metal |
138 |
| 75/242 |
Free metal is iron(fe), cobalt(co), or nickel(ni) only |
169 |
| 75/237 |
With another nonmetal |
103 |
| 75/238 |
Nonmetal is boron(b) or nitrogen(n) |
269 |
| 75/244 |
Containing boron(b) or nitrogen(n) |
504 |
| 75/231 |
Molybdenum sulfide or functional constituent (e.g., lubricant, abrasive, etc.) |
191 |
| 75/243 |
Nonmetal is elemental carbon(c) only |
262 |
| 75/232 |
Oxide containing |
251 |
| 75/235 |
Oxide of aluminum(al), beryllium(be), magnesium(mg), alkaline earth metal, scandium(sc), yttrium(y), lanthanide metal, actinide metal, titanium (ti), zirconium(zr), or hafnium(hf) |
277 |
| 75/234 |
Oxygen(o) associated with more than one metal |
147 |
| 75/233 |
With another nonmetal |
120 |
| 75/255 |
Loose particulate mixture (i.e., composition) containing metal particles |
553 |
| 75/252 |
Mixture contains particles of nonmetal |
442 |
| 75/254 |
Boron(b) containing particles |
86 |
| 75/253 |
Halogen containing particles |
27 |
| 75/301 |
Reactive furnace lining |
10 |
| 75/303 |
Solid treating composition for liquid metal (e.g., flux, slagging agent, casting agent, etc.) or charge |
43 |
| 75/313 |
Composition for or from consolidating by agglomerating, calcinating, compacting, indurating, roasting, sintering, or solidifying from molten mass |
40 |
| 75/327 |
Containing alkaline earth metal compound or aluminum(al) compound |
32 |
| 75/326 |
Containing clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate |
9 |
| 75/325 |
Containing coal, coke, pitch, asphalt, or tar |
19 |
| 75/314 |
Containing free metal |
40 |
| 75/315 |
Aluminum(al) or magnesium(mg) as free metal |
62 |
| 75/316 |
Iron(fe), iron scrap, or iron alloy as free metal |
46 |
| 75/318 |
And clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate |
14 |
| 75/317 |
And coal, coke, pitch, asphalt, or tar |
9 |
| 75/319 |
Containing iron(fe) compound |
26 |
| 75/323 |
And alkaline earth metal compound or aluminum(al) compound |
17 |
| 75/322 |
And clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate |
17 |
| 75/320 |
And coal, coke, pitch, asphalt, or tar |
17 |
| 75/321 |
And synthetic polymer, natural polymer, or carbohydrate |
31 |
| 75/324 |
Containing zinc(zn) compound |
10 |
| 75/329 |
Containing alkaline earth metal compound or aluminum(al) compound |
38 |
| 75/307 |
Containing boron(b) compound |
16 |
| 75/312 |
Containing carbide |
44 |
| 75/328 |
Containing free metal |
42 |
| 75/308 |
Containing halide |
13 |
| 75/311 |
And consolidated |
6 |
| 75/309 |
Containing fluoride |
58 |
| 75/310 |
And consolidated |
17 |
| 75/305 |
For casting or teeming operation |
66 |
| 75/306 |
For electrothermic operation (e.g., electroslag remelting, etc.) |
21 |
| 75/304 |
In wire, container, or article with surface feature |
59 |
| 75/302 |
Welding rod or electrode defined by composition |
16 |
| 75/950 |
Consolidated metal powder compositions of >95% theoretical density (e.g., wrought, etc.) |
48 |
| 75/951 |
Oxide containing (e.g., dispersion strengthened, etc.) |
22 |
| 75/957 |
Continuous refining of molten iron(fe) |
17 |
| 75/960 |
In zero gravity environment |
8 |
| 75/330 |
Processes |
31 |
| 75/746 |
Consolidating metalliferous material (e.g., ore, tailings, flue dust, fluxes, etc.) by agglomerating, compacting, or heat treating; preparatory process therefor; or treating consolidated material therefrom |
40 |
| 75/770 |
Agglomerating or compacting |
74 |
| 75/773 |
With alkaline earth metal compound, clay, or hydrosetting agent |
50 |
| 75/771 |
With coal, coke, pitch, asphalt, or tar |
38 |
| 75/772 |
With synthetic polymer, natural polymer, or carbohydrate |
54 |
| 75/747 |
Noble metal containing metalliferous material |
20 |
| 75/751 |
With heat treatment (e.g., calcinating, fusing, indurating, roasting, sintering, vaporizing, etc.) |
54 |
| 75/754 |
By suspension (e.g., fluid bed, cyclone, etc.) |
21 |
| 75/764 |
Coking of binder or additive |
11 |
| 75/762 |
In rotary kiln |
26 |
| 75/763 |
Sintering |
4 |
| 75/760 |
In shaft furnace or multi-hearth furnace |
9 |
| 75/761 |
Sintering |
2 |
| 75/755 |
On moving grate, moving pallet, or endless belt |
14 |
| 75/758 |
Sintering |
21 |
| 75/759 |
Of consolidated starting material |
15 |
| 75/756 |
Using multi-layers |
11 |
| 75/757 |
With gas recycling or reusing |
12 |
| 75/765 |
Sintering or with agglomerating or compacting |
31 |
| 75/769 |
Sintering |
23 |
| 75/768 |
With alkaline earth metal compound, clay, or hydrosetting agent |
30 |
| 75/766 |
With coal, coke, pitch, asphalt, or tar |
30 |
| 75/767 |
With synthetic polymer, natural polymer, or carbohydrate |
25 |
| 75/752 |
Vaporizing metalliferous impurity |
12 |
| 75/753 |
With leaching, dissolving, or washing |
27 |
| 75/749 |
With physical separation or classification of solids |
20 |
| 75/750 |
By sifting |
11 |
| 75/748 |
With vaporization of impurity as metal halide |
9 |
| 75/10.1 |
Electrothermic processes (e.g., microwave, induction, resistance, electric arc, plasma, etc.) |
46 |
| 75/10.39 |
Adding gaseous treating agent |
36 |
| 75/10.44 |
Carbon monoxide or carbon dioxide |
12 |
| 75/10.4 |
Gas contains gaseous oxygen |
29 |
| 75/10.41 |
Producing or treating iron(fe) or iron alloy |
36 |
| 75/10.42 |
With charge melting by electrothermal energy |
45 |
| 75/10.43 |
Hydrogen or water vapor |
21 |
| 75/10.45 |
Noble gas, nitrogen, or inert gas not otherwise identified |
39 |
| 75/10.46 |
Adding solid treating agent, slag or flux |
39 |
| 75/10.54 |
Alkali metal, alkaline earth metal, or compound thereof |
20 |
| 75/10.56 |
Calcium carbide |
2 |
| 75/10.57 |
Calcium carbonate (e.g., limestone, etc.) |
3 |
| 75/10.55 |
Calcium fluoride (e.g., fluorspar, fluorite, etc.) |
9 |
| 75/10.58 |
Calcium oxide (e.g., lime, calx, etc.) |
17 |
| 75/10.48 |
Aluminum(al) or compound thereof |
24 |
| 75/10.49 |
Boron(b) or compound thereof |
9 |
| 75/10.59 |
Carbon(c) containing material (e.g., carbon, carbonaceous material, carbide, etc.) |
20 |
| 75/10.6 |
Producing or treating iron(fe) or iron alloy |
19 |
| 75/10.61 |
With electric arc |
43 |
| 75/10.47 |
Magnesium(mg) or compound thereof |
16 |
| 75/10.5 |
Silicon(si) or compound thereof |
27 |
| 75/10.51 |
Ferrosilicon alloy |
16 |
| 75/10.52 |
Silicon carbide |
3 |
| 75/10.53 |
With lime present |
14 |
| 75/10.27 |
Carbothermic reduction of aluminum(al) compound |
46 |
| 75/10.23 |
Consumable metal-containing electrode |
25 |
| 75/10.24 |
Electroslag remelting |
40 |
| 75/10.25 |
Producing or treating chromium(cr), cobalt(co), copper(cu), iron(fe), manganese(mn), nickel(ni), titanium(ti), or alloy thereof |
39 |
| 75/10.26 |
Producing or treating titanium(ti) or zirconium(zr) or alloy thereof |
33 |
| 75/10.12 |
Controlling process through sensed condition |
37 |
| 75/10.29 |
Distillation or volatilization of refined metal or compound thereof |
38 |
| 75/10.33 |
Producing magnesium(mg) |
28 |
| 75/10.3 |
Producing zinc(zn) |
24 |
| 75/10.31 |
From consolidated material (e.g., briquette, pellet, etc.) |
9 |
| 75/10.32 |
With electric arc |
10 |
| 75/10.14 |
Electrical induction |
106 |
| 75/10.18 |
Producing or treating aluminum(al), beryllium(be), cobalt(co), chromium(cr), magnesium(mg), nickel(ni), titanium(ti), or alloy thereof |
55 |
| 75/10.15 |
Producing or treating iron(fe) or iron alloy |
59 |
| 75/10.17 |
With gaseous treating agent |
32 |
| 75/10.16 |
With induced magnetic stirring |
33 |
| 75/10.13 |
Electromagnetic wave energy (e.g., microwave, laser, etc.) |
45 |
| 75/10.36 |
Exhaust or top gas reused or treated |
33 |
| 75/10.38 |
Producing or treating iron(fe) or iron alloy |
50 |
| 75/10.37 |
With production of electrical energy |
7 |
| 75/10.65 |
Melting or holding melt |
48 |
| 75/10.66 |
Producing or treating iron(fe) or iron alloy |
50 |
| 75/10.19 |
Plasma |
170 |
| 75/10.2 |
Influenced by magnetic field |
14 |
| 75/10.21 |
Producing or treating aluminum(al) or aluminum alloy |
38 |
| 75/10.22 |
Producing or treating iron(fe) or iron alloy |
88 |
| 75/10.35 |
Reducing or smelting slag or dross as starting material |
40 |
| 75/10.62 |
Reducing or smelting |
43 |
| 75/10.63 |
Producing or treating iron(fe) or iron alloy |
74 |
| 75/10.34 |
Rotating chamber |
20 |
| 75/10.64 |
Vacuum purifying or degassing |
33 |
| 75/10.28 |
With volatilization of metal halide |
26 |
| 75/10.11 |
With zone melting or fractional crystallization |
48 |
| 75/10.67 |
Magnetic (e.g., electromagnetic, etc.) or electrostatic processes |
68 |
| 75/388 |
Preparing for amalgamation, preparing and amalgamating, or breaking amalgam to produce free metal |
18 |
| 75/389 |
And displacing with a metal other than mercury(hg) |
2 |
| 75/390 |
Utilizing a halogen containing agent |
1 |
| 75/391 |
Utilizing a nitrogen(n) containing agent |
1 |
| 75/375 |
Process control responsive to sensed condition |
59 |
| 75/386 |
Characteristic of treated material sensed (e.g., density, etc.) |
46 |
| 75/384 |
Composition sensed |
47 |
| 75/385 |
Of waste gas |
46 |
| 75/387 |
Flow rate sensed |
47 |
| 75/378 |
Pressure sensed |
23 |
| 75/379 |
Of feed gas |
17 |
| 75/376 |
Removing material from process to sense condition |
20 |
| 75/377 |
Material removed is molten metal |
17 |
| 75/380 |
Temperature sensed |
31 |
| 75/382 |
Of molten metal |
36 |
| 75/383 |
Of sintered material |
0 |
| 75/381 |
Of waste gas |
22 |
| 75/343 |
Producing or purifying free metal powder or producing or purifying alloys in powder form (i.e., named or of size up to 1,000 microns in its largest dimension) |
108 |
| 75/363 |
At 300 degrees c or greater |
72 |
| 75/364 |
Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions |
35 |
| 75/365 |
Step at 300 degrees c or greater after step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions |
94 |
| 75/369 |
Purifying powdered metal or reducing powdered metal compound to free metal |
141 |
| 75/368 |
Settling of powder in molten metal or salt bath |
24 |
| 75/366 |
Utilizing a fluidized bed |
14 |
| 75/367 |
Vaporizing or condensing free metal |
51 |
| 75/362 |
Decomposition of organo-compound containing metal or metal carbonyl |
113 |
| 75/354 |
Including comminution |
50 |
| 75/356 |
And shaping or sintering prior to comminution |
41 |
| 75/355 |
Directly from liquid mass (e.g., by atomizing, etc.) |
39 |
| 75/361 |
Using nonmetallic material which is liquid under standard conditions |
22 |
| 75/357 |
With step at 300 degrees c or greater |
24 |
| 75/359 |
Reduction |
45 |
| 75/360 |
Use of gas |
30 |
| 75/358 |
Use of salt bath |
9 |
| 75/351 |
Producing alloy |
210 |
| 75/352 |
Including comminution |
109 |
| 75/348 |
Producing or purifying named magnetic material |
118 |
| 75/350 |
Using alkaline earth metal or compound thereof |
23 |
| 75/349 |
Using phosphorus(p), boron(b), or silicon(si) or compound thereof |
91 |
| 75/344 |
Radioactive |
16 |
| 75/370 |
Using nonmetallic material which is liquid under standard conditions |
112 |
| 75/371 |
And settling of free metal from solution |
102 |
| 75/373 |
Copper(cu) recovered |
41 |
| 75/372 |
Displacing by another metal (i.e., electromotive series) |
6 |
| 75/374 |
Nickel(ni) or cobalt(co) recovered |
58 |
| 75/345 |
Utilizing electrothermic, magnetic, or wave energy |
69 |
| 75/347 |
Utilizing magnetism |
38 |
| 75/346 |
Utilizing plasma |
82 |
| 75/353 |
Utilizing scrap material |
30 |
| 75/392 |
Producing or treating free metal |
38 |
| 75/406 |
Adsorbing impurity from vaporous or liquid metal |
9 |
| 75/414 |
At 300 degrees c or greater (e.g., pyrometallurgy, etc.) |
168 |
| 75/416 |
Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) |
51 |
| 75/429 |
Copper(cu) obtained |
32 |
| 75/430 |
Iron(fe), cobalt(co), or nickel(ni) obtained |
57 |
| 75/426 |
Noble metal obtained |
33 |
| 75/428 |
Gold(au) |
20 |
| 75/427 |
Silver(ag) |
22 |
| 75/418 |
Obtaining metal from electrolytic slime |
8 |
| 75/417 |
Obtaining metal from photographic waste |
17 |
| 75/419 |
Step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions after a step at 300 degrees c or greater |
68 |
| 75/420 |
Step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions is reduction to free metal |
22 |
| 75/424 |
Copper(cu) |
16 |
| 75/425 |
Iron(fe), cobalt(co), or nickel(ni) |
15 |
| 75/421 |
Noble metal |
20 |
| 75/423 |
Gold(au) |
17 |
| 75/422 |
Silver(ag) |
18 |
| 75/432 |
Tin(sn) or lead(pb) obtained |
28 |
| 75/431 |
Zinc(zn), cadmium(cd), or mercury(hg) obtained |
22 |
| 75/709 |
Covering the surface of molten metal |
36 |
| 75/415 |
Foam |
33 |
| 75/433 |
Iron(fe) |
38 |
| 75/458 |
Blast furnace reduction to produce molten iron(fe) |
23 |
| 75/472 |
Defined composition of iron(fe) source |
15 |
| 75/471 |
Defined composition of reductant |
24 |
| 75/470 |
Defined composition of slag |
5 |
| 75/469 |
Specified method of charging burden |
15 |
| 75/467 |
Tapping molten product |
9 |
| 75/468 |
Top gas recovery |
21 |
| 75/459 |
Using additive to the blast |
9 |
| 75/460 |
Carbonaceous |
32 |
| 75/463 |
Gaseous |
10 |
| 75/464 |
Recycled off gas |
9 |
| 75/462 |
Liquid |
2 |
| 75/461 |
Slurry of solid in liquid |
5 |
| 75/466 |
Oxygen enrichment |
22 |
| 75/465 |
Water |
4 |
| 75/486 |
Heating reduction zone by heat conducted through walls of zone |
4 |
| 75/487 |
Shaft furnace |
7 |
| 75/438 |
Making wrought iron(fe) |
0 |
| 75/441 |
Directly from iron(fe) compound only (no metallic iron) |
0 |
| 75/442 |
In moving furnace |
0 |
| 75/439 |
Pouring molten iron(fe) into molten slag (i.e., aston process) |
1 |
| 75/440 |
Utilizing moving hearth |
0 |
| 75/507 |
Melting iron(fe) or treating molten iron |
17 |
| 75/526 |
Adding solid treating agent in form of wire, rod, or article with surface feature or in container or by plunging means |
67 |
| 75/525 |
Impinging free falling molten metal stream or spray with a gas or solid agent or spraying (e.g., atomizing, etc.) of molten metal |
19 |
| 75/513 |
In reverberatory furnace (e.g., open-hearth, siemens-martin, puddling, etc.) |
3 |
| 75/523 |
Melting solid iron(fe) |
5 |
| 75/516 |
Using gaseous oxygen in a higher concentration than in ambient air |
10 |
| 75/517 |
With addition of solid elemental carbon(c) or employing elemental carbon furnace lining |
3 |
| 75/520 |
With alkaline earth metal or magnesium(mg) containing compound |
4 |
| 75/518 |
With compound containing alkali metal and oxygen (e.g., sodium nitrate, sodium carbonate, etc.) |
0 |
| 75/519 |
With halogen or halogen containing compound (e.g., sodium chloride, fluorspar, etc.) |
0 |
| 75/515 |
With melting iron(fe) in shaft furnace |
1 |
| 75/521 |
With transition metal compound |
0 |
| 75/522 |
Iron oxide |
0 |
| 75/514 |
With treating of molten iron(fe) with gas outside reverberatory furnace (e.g., in bessemer converter, etc.) |
1 |
| 75/527 |
In rotary kiln (e.g., kaldo process, etc.) |
11 |
| 75/528 |
Injecting gas or nonmetalliferous liquid which gasifies into, onto, or through premelted iron(fe) or slag layer thereon |
48 |
| 75/531 |
And adding solid agent, slag, or flux to premelted iron(fe) or slag layer thereon |
38 |
| 75/547 |
Gas compound containing oxygen (e.g., carbon monoxide, carbon dioxide, water, etc.) |
8 |
| 75/540 |
Gas contains gaseous oxygen |
29 |
| 75/545 |
Alkali metal compound or alkaline earth metal compound |
24 |
| 75/542 |
Carbide |
6 |
| 75/543 |
Elemental metal or elemental silicon(si) |
38 |
| 75/544 |
Iron(fe) containing compound |
26 |
| 75/541 |
Metal halide |
13 |
| 75/532 |
Loose elemental carbon(c), coal, or coke (e.g., carburizing, etc.) |
79 |
| 75/546 |
Noble gas or inert gas not otherwise identified |
34 |
| 75/533 |
With solid entrained in gas or injected by gas pressure |
51 |
| 75/539 |
Alkali metal compound or alkaline earth metal compound used in process |
51 |
| 75/534 |
Boron(b) or compound thereof used in process |
5 |
| 75/536 |
Carbide used in process |
23 |
| 75/537 |
Elemental metal or elemental silicon(si) used in process |
50 |
| 75/538 |
Iron(fe) containing compound used in process |
18 |
| 75/535 |
Metal halide used in process |
27 |
| 75/559 |
Gas compound containing oxygen (e.g., carbon monoxide, carbon dioxide, water, etc.) |
23 |
| 75/548 |
Gas contains gaseous oxygen |
28 |
| 75/551 |
Injecting from above and below melt surface |
19 |
| 75/552 |
Including other gas from below |
33 |
| 75/553 |
Injecting only from above melt surface |
32 |
| 75/554 |
Including other gas from above |
15 |
| 75/555 |
Including other gas from below |
25 |
| 75/556 |
Injecting only from below melt surface |
15 |
| 75/557 |
Including other gas from below |
29 |
| 75/549 |
With treatment of exhaust gas |
19 |
| 75/550 |
And adding gaseous oxygen or inert gas to exhaust gas |
12 |
| 75/558 |
Noble gas or inert gas not otherwise identified |
30 |
| 75/529 |
With hydrocarbon liquid or gas present |
41 |
| 75/530 |
And hydrocarbon in surrounding relationship to gaseous oxygen (e.g., hydrocarbon in outer concentric tube, etc.) |
59 |
| 75/571 |
Melting solid iron(fe) |
25 |
| 75/580 |
In closed vessel with heat conducted through walls only (e.g., crucible melting, etc.) |
2 |
| 75/573 |
In shaft furnace (e.g., cupola, etc.) |
16 |
| 75/577 |
Defined composition of solid fuel other than nominal "coke" |
6 |
| 75/576 |
Using both a solid carbonaceous fuel (e.g., coke, etc.) and a fluid (e.g, natural gas, etc.) |
5 |
| 75/575 |
Using oxygen in a higher concentration than ambient air |
9 |
| 75/579 |
With alkali metal compound |
3 |
| 75/578 |
With calcium carbide |
1 |
| 75/574 |
Without the use of solid, carbonaceous material (e.g., without coke, etc.) |
13 |
| 75/572 |
Melting packaged iron(fe) or iron of specified structure to facilitate melting (e.g., shaped bale of scrap, etc.) |
12 |
| 75/581 |
Melting scrap |
79 |
| 75/584 |
Pouring or tapping molten iron(fe) |
39 |
| 75/582 |
Separating slag from molten iron(fe) |
37 |
| 75/524 |
Sequential treatment of molten iron(fe) in plural apparatus with different linings (e.g., acid bessemer followed by basic bessemer, etc.) |
3 |
| 75/583 |
Stirring or agitating molten iron(fe) |
30 |
| 75/560 |
Treating premelted iron(fe) or slag layer thereon by adding solid agent, slag, or flux |
68 |
| 75/570 |
Alkali metal compound or alkaline earth metal compound |
40 |
| 75/564 |
Boron(b) or compound thereof |
16 |
| 75/566 |
Carbide |
32 |
| 75/567 |
Elemental metal or elemental silicon(si) |
66 |
| 75/568 |
Aluminum(al) or magnesium(mg) |
86 |
| 75/569 |
Iron(fe) containing compound |
23 |
| 75/561 |
Loose elemental carbon(c), coal, or coke (e.g., carburizing, etc.) |
30 |
| 75/565 |
Metal halide |
23 |
| 75/563 |
Nitrate, chlorate, permanganate, or peroxide |
1 |
| 75/562 |
Sulfur(s) or compound thereof |
12 |
| 75/508 |
Vacuum treatment of molten iron(fe) |
57 |
| 75/509 |
Free falling stream or spray of molten iron(fe) |
11 |
| 75/510 |
Vacuum lift |
9 |
| 75/511 |
With addition of gas |
24 |
| 75/512 |
With addition of gas |
62 |
| 75/484 |
Moving furnace or hearth (e.g., moving belt, etc.) |
76 |
| 75/485 |
Reduction in molten state |
11 |
| 75/443 |
Reducing in gaseous suspension |
21 |
| 75/453 |
Cyclone apparatus used |
25 |
| 75/444 |
Fluidized bed |
45 |
| 75/450 |
Using plural fluidized bed furnaces |
46 |
| 75/451 |
Using plural fluidized bed zones within a furnace |
14 |
| 75/445 |
With melting of iron(fe) |
28 |
| 75/446 |
Outside the fluidized bed |
70 |
| 75/447 |
With solid in fluidized bed in addition to reducible iron(fe) compound |
11 |
| 75/448 |
Carbon(c) |
26 |
| 75/449 |
Generated in situ |
2 |
| 75/452 |
Solid product produced (without melting) |
6 |
| 75/454 |
Using same inlet to feed solid and gas |
10 |
| 75/457 |
Inlet feeds upwardly |
1 |
| 75/455 |
Inlet is a burner |
9 |
| 75/456 |
Burner is horizontal |
0 |
| 75/437 |
Reducing iron(fe) halide |
14 |
| 75/473 |
Reduction in closed retort (e.g., hoganas process, etc.) |
6 |
| 75/500 |
Reduction in molten state |
93 |
| 75/501 |
Gas injection below surface of melt |
71 |
| 75/502 |
Gas injection over surface of melt (e.g., as in reverberatory furnace, etc.) |
58 |
| 75/503 |
Reduction in presence of solid carbon(c) containing material (e.g., coke, coal, carbides, etc.) |
48 |
| 75/504 |
Including consolidation of solid carbon(c) containing material with reducible iron(fe) compound |
39 |
| 75/474 |
Reduction in rotary kiln |
14 |
| 75/477 |
Introducing solid reductant into rotary kiln |
21 |
| 75/479 |
Any part of the charge is consolidated by agglomerating, compacting, indurating, or sintering (e.g., pelletized ore, flux, or reductant, etc.) |
20 |
| 75/480 |
Reducible iron(fe) compound and solid reductant fed through same end of rotary kiln |
11 |
| 75/481 |
Mixed prior to charging |
8 |
| 75/478 |
Solid reductant is recycled |
11 |
| 75/482 |
With generation of gaseous reductant outside rotary kiln |
7 |
| 75/475 |
With melting of iron(fe) product |
7 |
| 75/476 |
Iron(fe) product melted within rotary kiln |
7 |
| 75/506 |
Reduction in the presence of liquid carbonaceous reductant (e.g., petroleum, pitch, etc.) |
2 |
| 75/488 |
Reduction to metallic iron(fe) within shaft furnace |
12 |
| 75/489 |
Externally supplied gas reductant |
6 |
| 75/490 |
Solid iron(fe) produced within shaft furnace |
46 |
| 75/495 |
Direct addition of gas containing gaseous oxygen or water to shaft furnace (e.g., continuous hyl process, etc.) |
23 |
| 75/493 |
Using solid carbon(c) to generate gas in separate furnace (e.g., wiberg process, etc.) |
9 |
| 75/494 |
Solid carbon(c) is coal |
14 |
| 75/491 |
With melting iron(fe) product outside shaft furnace |
20 |
| 75/492 |
With gasification of solid carbonaceous material in melt (e.g., coal, etc.) |
66 |
| 75/496 |
With reformation of reducing gas in separate furnace (e.g., midrex process, etc.) |
54 |
| 75/498 |
With addition of steam to reformer (e.g., armco process, etc.) |
10 |
| 75/497 |
With plural reformers (e.g., purofer process, etc.) |
4 |
| 75/499 |
Molten iron(fe) produced in shaft furnace |
19 |
| 75/505 |
Reduction with externally applied gas (e.g., batch hyl process, etc.) |
66 |
| 75/483 |
Superposed multiple hearth reduction |
12 |
| 75/434 |
With concurrent production of hydraulic cement |
24 |
| 75/435 |
With concurrent production of titanium dioxide |
20 |
| 75/436 |
With consolidation (e.g., pelletizing, etc.) of solid metallic iron(fe) product after reduction |
48 |
| 75/585 |
Nonferrous |
52 |
| 75/589 |
Alkali metal, singly or in combination |
16 |
| 75/592 |
Precipitating impurities from molten alkali metal |
7 |
| 75/590 |
Vaporizing or condensing |
14 |
| 75/591 |
Cesium(cs) |
2 |
| 75/605 |
Alkaline earth metal, singly or in combination |
6 |
| 75/606 |
Reducing halide |
2 |
| 75/609 |
Treating molten alkaline earth metal |
0 |
| 75/607 |
Vaporizing or condensing |
2 |
| 75/608 |
Reduction |
7 |
| 75/671 |
Aluminum(al) |
19 |
| 75/686 |
Melting aluminum(al) |
31 |
| 75/687 |
Scrap |
78 |
| 75/673 |
Reduction |
10 |
| 75/674 |
Carbothermic |
41 |
| 75/675 |
Decomposition of organo-compound containing aluminum(al) |
1 |
| 75/676 |
Of aluminum(al) halide |
6 |
| 75/677 |
Of subhalide |
8 |
| 75/678 |
Treating molten aluminum(al) |
52 |
| 75/680 |
Adding gas |
65 |
| 75/683 |
And solid |
26 |
| 75/681 |
Containing halogen atom |
60 |
| 75/682 |
And adding solid |
13 |
| 75/684 |
Adding solid |
58 |
| 75/685 |
Containing halogen |
31 |
| 75/679 |
Fractional crystallization |
17 |
| 75/672 |
Treating slag or dross |
59 |
| 75/703 |
Antimony(sb) |
9 |
| 75/704 |
Reduction |
8 |
| 75/706 |
Arsenic(as) |
8 |
| 75/593 |
Beryllium(be) |
5 |
| 75/705 |
Bismuth(bi) |
12 |
| 75/668 |
Cadmium(cd) |
10 |
| 75/669 |
Vaporizing or condensing |
27 |
| 75/626 |
Cobalt(co) |
23 |
| 75/627 |
Reduction |
32 |
| 75/586 |
Concurrent production of nonferrous metal and other desired nonmetallic product (e.g., cement, etc.) |
24 |
| 75/638 |
Copper(cu) |
21 |
| 75/653 |
Melting copper(cu) in shaft furnace |
12 |
| 75/641 |
Reduction |
35 |
| 75/642 |
Segregation process |
2 |
| 75/643 |
Treating matte or sulfide |
59 |
| 75/644 |
Treating waste gas |
16 |
| 75/645 |
With prior production of matte or sulfide |
35 |
| 75/639 |
Treating material in gaseous suspension |
42 |
| 75/646 |
Treating molten copper(cu) |
13 |
| 75/648 |
Adding gas |
20 |
| 75/651 |
And solid |
5 |
| 75/649 |
Containing gaseous oxygen |
24 |
| 75/650 |
And adding solid |
12 |
| 75/652 |
Adding solid |
16 |
| 75/647 |
By vacuum |
6 |
| 75/640 |
Treating slag or dross |
39 |
| 75/587 |
Countercurrent liquid-liquid extraction of molten nonferrous metal |
5 |
| 75/588 |
Fractionation of molten nonferrous metal (e.g., with reflux, etc.) |
15 |
| 75/688 |
Gallium(ga) or indium(in) |
16 |
| 75/689 |
Germanium(ge) |
6 |
| 75/693 |
Lead(pb) |
30 |
| 75/695 |
Reduction |
50 |
| 75/696 |
Of lead-sulfur compound |
52 |
| 75/694 |
Treating material in gaseous suspension or gaseous state |
32 |
| 75/697 |
Treating molten lead(pb) |
15 |
| 75/699 |
Adding gas |
17 |
| 75/700 |
Containing halogen atom |
3 |
| 75/701 |
Adding solid |
14 |
| 75/702 |
Containing free metal |
15 |
| 75/698 |
By vacuum |
0 |
| 75/594 |
Magnesium(mg) |
18 |
| 75/600 |
Treating molten magnesium(mg) |
14 |
| 75/602 |
Adding gas |
17 |
| 75/603 |
And solid |
9 |
| 75/604 |
Adding solid |
18 |
| 75/601 |
Precipitating impurities from molten magnesium(mg) |
7 |
| 75/595 |
Vaporizing or condensing |
11 |
| 75/596 |
Reduction |
4 |
| 75/599 |
Using carbon(c) |
8 |
| 75/597 |
Using metal or metal compound reductant |
18 |
| 75/598 |
And carbon(c) |
5 |
| 75/624 |
Manganese(mn) |
12 |
| 75/625 |
Reduction |
16 |
| 75/670 |
Mercury(hg) |
43 |
| 75/628 |
Nickel(ni) |
44 |
| 75/629 |
Reduction |
81 |
| 75/630 |
Segregation process |
2 |
| 75/631 |
Noble metal, singly or in combination |
29 |
| 75/637 |
Gold(au) |
28 |
| 75/632 |
Palladium(pd) |
12 |
| 75/633 |
Platinum(pt) |
24 |
| 75/634 |
Silver(ag) |
30 |
| 75/635 |
Recovering silver(ag) from photographic material |
3 |
| 75/636 |
Reduction |
13 |
| 75/610 |
Rare earth metal, singly or in combination |
19 |
| 75/611 |
Refractory metal, singly or in combination |
5 |
| 75/623 |
Chromium(cr), molybdenum(mo), or tungsten(w), singly or in combination |
84 |
| 75/612 |
Titanium(ti), zirconium(zr), or hafnium(hf), singly or in combination |
34 |
| 75/613 |
Reduction |
9 |
| 75/620 |
Of titanium(ti), zirconium(zr), or hafnium(hf) compound containing halogen |
14 |
| 75/614 |
Using free metal or alloy reductant |
8 |
| 75/615 |
Of titanium(ti), zirconium(zr), or hafnium(hf), compound containing halogen |
9 |
| 75/616 |
Of binary halide - mx(4) |
10 |
| 75/617 |
Of chloride - mc1(4) |
18 |
| 75/618 |
Free metal or alloy reductant contains magnesium(mg) |
25 |
| 75/619 |
Metal produced is titanium(ti) |
23 |
| 75/621 |
Treating molten titanium(ti), zirconium(zr), or hafnium(hf) |
14 |
| 75/622 |
Vanadium(v), niobium(nb) or columbium(cb), or tantalum(ta), singly or in combination |
52 |
| 75/690 |
Tin(sn) |
28 |
| 75/691 |
Reduction |
17 |
| 75/692 |
Of halogen containing material |
4 |
| 75/654 |
Zinc(zn) |
12 |
| 75/656 |
Reduction |
22 |
| 75/657 |
Using halogen containing material |
2 |
| 75/658 |
Vaporizing or condensing |
42 |
| 75/660 |
Treating material in blast furnace or cupola |
7 |
| 75/659 |
Treating material in gaseous suspension |
11 |
| 75/662 |
Treating material in rotary kiln |
5 |
| 75/661 |
Treating material in vertical retort |
5 |
| 75/663 |
Treating molten or vaporous zinc(zn) |
21 |
| 75/664 |
Using halogen containing material |
4 |
| 75/665 |
Vaporizing or condensing |
15 |
| 75/666 |
Condensing with lead(pb) coolant |
6 |
| 75/667 |
Condensing with use of molten metal slinger |
0 |
| 75/655 |
Treating slag or dross |
23 |
| 75/707 |
Reducing or smelting unnamed ore |
36 |
| 75/708 |
Stirring or agitating of molten material |
74 |
| 75/710 |
Below 300 degrees c |
65 |
| 75/745 |
Alkali metal, singly or in combination |
8 |
| 75/711 |
Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) |
90 |
| 75/742 |
Cleaning, leaching, or dissolving of mercury(hg) |
29 |
| 75/724 |
Displacing by another metal (i.e., electromotive series) |
83 |
| 75/726 |
Copper(cu) recovered as free metal |
68 |
| 75/727 |
And flotation |
2 |
| 75/728 |
And injecting or pressurizing with air or oxygen |
18 |
| 75/729 |
From cyanide solution |
4 |
| 75/731 |
Utilizing leaching agent containing sulfur(s) |
21 |
| 75/730 |
With agitating or abrading |
13 |
| 75/725 |
Lead(pb) or zinc(zn) recovered as free metal |
53 |
| 75/738 |
Nickel(ni) or cobalt(co) recovered as free metal |
33 |
| 75/732 |
Noble metal recovered as free metal |
31 |
| 75/736 |
Gold(au) recovered as free metal |
59 |
| 75/737 |
From cyanide solution |
30 |
| 75/733 |
Silver(ag) recovered as free metal |
65 |
| 75/734 |
And injecting or pressurizing with air or oxygen |
11 |
| 75/735 |
From cyanide solution |
18 |
| 75/714 |
From electrolytic or cementation slime |
32 |
| 75/713 |
From photography material |
73 |
| 75/712 |
Involving mining or in situ operation |
99 |
| 75/722 |
Involving organic compound containing metal or organic agent for agglomerating metal |
114 |
| 75/723 |
Natural or synthetic polymer |
36 |
| 75/717 |
Reducing to free metal with gas |
25 |
| 75/718 |
Copper (cu) recovered as free metal |
31 |
| 75/719 |
Using sulfur dioxide |
3 |
| 75/720 |
Noble metal recovered as free metal |
24 |
| 75/715 |
Removing coating to recover free metal from substrate or coating |
32 |
| 75/716 |
From tin(sn) scrap or tin plate |
0 |
| 75/739 |
Utilizing chemical agent to precipitate free metal |
57 |
| 75/740 |
Copper(cu) recovered as free metal |
34 |
| 75/741 |
Noble metal recovered as free metal |
62 |
| 75/721 |
Utilizing organic reducing agent |
57 |
| 75/743 |
With leaching or dissolving |
214 |
| 75/744 |
Noble metal recovered as free metal |
198 |
| 75/407 |
Filtering vaporous or liquid metal |
75 |
| 75/408 |
Alkali metal, singly or in combination |
11 |
| 75/412 |
Aluminum(al) |
67 |
| 75/411 |
Copper(cu) |
16 |
| 75/409 |
Magnesium(mg) |
6 |
| 75/410 |
Noble metal, singly or in combination |
4 |
| 75/400 |
Free metal production from sea nodules |
21 |
| 75/413 |
From metal carbonyl or carbon monoxide complex |
21 |
| 75/405 |
Removing gas from liquid metal by use of gas permeable membrane |
6 |
| 75/404 |
Separating liquid metal by centrifuging |
13 |
| 75/401 |
Treating multicomponent metal-containing scrap having an integral substrate to separate metal therefrom by temperature modification or chemical process at least one metal remains solid during separation |
41 |
| 75/403 |
Removing nonmetal from metal |
62 |
| 75/402 |
Utilizing molten salt bath |
3 |
| 75/393 |
Utilizing radioactive material, producing or treating radioactive metal |
27 |
| 75/396 |
Plutonium(pu) |
8 |
| 75/397 |
Reduction |
11 |
| 75/394 |
Thorium(th) |
5 |
| 75/395 |
Reduction |
8 |
| 75/398 |
Uranium(u) |
23 |
| 75/399 |
Reduction |
30 |
| 75/331 |
Producing solid particulate free metal directly from liquid metal (e.g., liquid comminuting, etc.) |
77 |
| 75/340 |
By extrusion spraying or gravity fall through orifice |
58 |
| 75/341 |
Into moving fluid |
12 |
| 75/338 |
By impinging or atomizing with gaseous jet or blast |
185 |
| 75/339 |
Gas used is air |
27 |
| 75/337 |
By impinging plural liquid streams |
58 |
| 75/335 |
By vibrating or agitating |
46 |
| 75/333 |
Utilizing centrifugal force or rotating forming zone to comminute liquid metal |
40 |
| 75/334 |
Including directing liquid metal onto rotating disc |
41 |
| 75/336 |
Utilizing electrothermic energy to comminute |
51 |
| 75/332 |
With subsequent coating of the particles |
35 |
| 75/342 |
Spheroidizing or rounding of existing solid metal particles |
55 |
| 75/955 |
Producing dental product |
23 |
| 75/952 |
Producing fibers, filaments, or whiskers |
19 |
| 75/954 |
Producing flakes or crystals |
30 |
| 75/956 |
Producing particles containing a dispersed phase |
39 |
| 75/953 |
Producing spheres |
31 |
| 75/959 |
Thermit-type reaction of solid materials only to yield molten metal |
25 |
| 75/961 |
Treating flue dust to obtain metal (other than by consolidation) |
161 |
| 75/962 |
Treating or using mill scale |
38 |
| 75/958 |
With concurrent production of iron(fe) and other desired nonmetallic product (e.g., energy, fertilizer, etc.) |
81 |
