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Class Information
Number: 75
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures >
Description: This is the generic class for specialized metallurgical processes for producing or recovering metals from metal compounds, ores, or scrap metal and for refining liquid metal and for compositions used in these specialized metallurgical processes, consolidated metal powder compositions, and loose metal particulate mixtures.










Class Number Class Name No. of Patents
75/300

Compositions

29
75/228

Consolidated metal powder compositions

244
75/249

Base metal one or more of beryllium(be), magnesium(mg), or aluminum(al)

231
75/250

Base metal is beryllium(be) only

7
75/245

Base metal one or more transition metal

316
75/248

Base metal confined to tungsten(w)

144
75/246

Base metal one or more of iron group, copper(cu), or noble metal

772
75/247

Base metal one or more of copper(cu) or noble metal

214
75/229

Flake or fibrous constituent or fibrous grain structure

126
75/230

With nonmetal constituent - silicon(si) considered a metal (e.g., cermet, etc.)

251
75/236

Carbide containing

372
75/240

Carbide only of chromium(cr), molybdenum(mo), or tungsten(w)

308
75/239

Carbide only of vanadium(v), niobium(nb) or columbium(cb), or tantalum(ta)

124
75/241

Carbon(c) associated with more than one metal

147
75/242

Free metal is iron(fe), cobalt(co), or nickel(ni) only

180
75/237

With another nonmetal

106
75/238

Nonmetal is boron(b) or nitrogen(n)

281
75/244

Containing boron(b) or nitrogen(n)

540
75/231

Molybdenum sulfide or functional constituent (e.g., lubricant, abrasive, etc.)

205
75/243

Nonmetal is elemental carbon(c) only

286
75/232

Oxide containing

270
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)

287
75/234

Oxygen(o) associated with more than one metal

149
75/233

With another nonmetal

120
75/255

Loose particulate mixture (i.e., composition) containing metal particles

635
75/252

Mixture contains particles of nonmetal

512
75/254

Boron(b) containing particles

88
75/253

Halogen containing particles

30
75/301

Reactive furnace lining

14
75/303

Solid treating composition for liquid metal (e.g., flux, slagging agent, casting agent, etc.) or charge

48
75/313

Composition for or from consolidating by agglomerating, calcinating, compacting, indurating, roasting, sintering, or solidifying from molten mass

49
75/327

Containing alkaline earth metal compound or aluminum(al) compound

36
75/326

Containing clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate

11
75/325

Containing coal, coke, pitch, asphalt, or tar

20
75/314

Containing free metal

48
75/315

Aluminum(al) or magnesium(mg) as free metal

66
75/316

Iron(fe), iron scrap, or iron alloy as free metal

52
75/318

And clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate

14
75/317

And coal, coke, pitch, asphalt, or tar

11
75/319

Containing iron(fe) compound

27
75/323

And alkaline earth metal compound or aluminum(al) compound

19
75/322

And clay (e.g., bentonite, montmorillonite, etc.), cement, or alkali metal silicate

18
75/320

And coal, coke, pitch, asphalt, or tar

19
75/321

And synthetic polymer, natural polymer, or carbohydrate

32
75/324

Containing zinc(zn) compound

11
75/329

Containing alkaline earth metal compound or aluminum(al) compound

42
75/307

Containing boron(b) compound

16
75/312

Containing carbide

44
75/328

Containing free metal

43
75/308

Containing halide

15
75/311

And consolidated

6
75/309

Containing fluoride

60
75/310

And consolidated

18
75/305

For casting or teeming operation

69
75/306

For electrothermic operation (e.g., electroslag remelting, etc.)

24
75/304

In wire, container, or article with surface feature

61
75/302

Welding rod or electrode defined by composition

21
75/950

Consolidated metal powder compositions of >95% theoretical density (e.g., wrought, etc.)

48
75/951

Oxide containing (e.g., dispersion strengthened, etc.)

24
75/957

Continuous refining of molten iron(fe)

18
75/960

In zero gravity environment

8
75/330

Processes

46
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

46
75/770

Agglomerating or compacting

109
75/773

With alkaline earth metal compound, clay, or hydrosetting agent

55
75/771

With coal, coke, pitch, asphalt, or tar

49
75/772

With synthetic polymer, natural polymer, or carbohydrate

61
75/747

Noble metal containing metalliferous material

20
75/751

With heat treatment (e.g., calcinating, fusing, indurating, roasting, sintering, vaporizing, etc.)

63
75/754

By suspension (e.g., fluid bed, cyclone, etc.)

23
75/764

Coking of binder or additive

12
75/762

In rotary kiln

30
75/763

Sintering

5
75/760

In shaft furnace or multi-hearth furnace

10
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

12
75/757

With gas recycling or reusing

13
75/765

Sintering or with agglomerating or compacting

38
75/769

Sintering

23
75/768

With alkaline earth metal compound, clay, or hydrosetting agent

31
75/766

With coal, coke, pitch, asphalt, or tar

32
75/767

With synthetic polymer, natural polymer, or carbohydrate

25
75/752

Vaporizing metalliferous impurity

13
75/753

With leaching, dissolving, or washing

28
75/749

With physical separation or classification of solids

26
75/750

By sifting

14
75/748

With vaporization of impurity as metal halide

9
75/10.1

Electrothermic processes (e.g., microwave, induction, resistance, electric arc, plasma, etc.)

51
75/10.39

Adding gaseous treating agent

45
75/10.44

Carbon monoxide or carbon dioxide

13
75/10.4

Gas contains gaseous oxygen

44
75/10.41

Producing or treating iron(fe) or iron alloy

37
75/10.42

With charge melting by electrothermal energy

46
75/10.43

Hydrogen or water vapor

22
75/10.45

Noble gas, nitrogen, or inert gas not otherwise identified

43
75/10.46

Adding solid treating agent, slag or flux

69
75/10.54

Alkali metal, alkaline earth metal, or compound thereof

22
75/10.56

Calcium carbide

3
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.)

19
75/10.48

Aluminum(al) or compound thereof

29
75/10.49

Boron(b) or compound thereof

12
75/10.59

Carbon(c) containing material (e.g., carbon, carbonaceous material, carbide, etc.)

25
75/10.6

Producing or treating iron(fe) or iron alloy

21
75/10.61

With electric arc

48
75/10.47

Magnesium(mg) or compound thereof

20
75/10.5

Silicon(si) or compound thereof

29
75/10.51

Ferrosilicon alloy

17
75/10.52

Silicon carbide

7
75/10.53

With lime present

14
75/10.27

Carbothermic reduction of aluminum(al) compound

52
75/10.23

Consumable metal-containing electrode

27
75/10.24

Electroslag remelting

42
75/10.25

Producing or treating chromium(cr), cobalt(co), copper(cu), iron(fe), manganese(mn), nickel(ni), titanium(ti), or alloy thereof

43
75/10.26

Producing or treating titanium(ti) or zirconium(zr) or alloy thereof

34
75/10.12

Controlling process through sensed condition

40
75/10.29

Distillation or volatilization of refined metal or compound thereof

42
75/10.33

Producing magnesium(mg)

28
75/10.3

Producing zinc(zn)

26
75/10.31

From consolidated material (e.g., briquette, pellet, etc.)

9
75/10.32

With electric arc

10
75/10.14

Electrical induction

122
75/10.18

Producing or treating aluminum(al), beryllium(be), cobalt(co), chromium(cr), magnesium(mg), nickel(ni), titanium(ti), or alloy thereof

65
75/10.15

Producing or treating iron(fe) or iron alloy

69
75/10.17

With gaseous treating agent

34
75/10.16

With induced magnetic stirring

35
75/10.13

Electromagnetic wave energy (e.g., microwave, laser, etc.)

66
75/10.36

Exhaust or top gas reused or treated

38
75/10.38

Producing or treating iron(fe) or iron alloy

52
75/10.37

With production of electrical energy

7
75/10.65

Melting or holding melt

59
75/10.66

Producing or treating iron(fe) or iron alloy

52
75/10.19

Plasma

182
75/10.2

Influenced by magnetic field

15
75/10.21

Producing or treating aluminum(al) or aluminum alloy

42
75/10.22

Producing or treating iron(fe) or iron alloy

95
75/10.35

Reducing or smelting slag or dross as starting material

46
75/10.62

Reducing or smelting

60
75/10.63

Producing or treating iron(fe) or iron alloy

86
75/10.34

Rotating chamber

21
75/10.64

Vacuum purifying or degassing

36
75/10.28

With volatilization of metal halide

26
75/10.11

With zone melting or fractional crystallization

51
75/10.67

Magnetic (e.g., electromagnetic, etc.) or electrostatic processes

83
75/388

Preparing for amalgamation, preparing and amalgamating, or breaking amalgam to produce free metal

20
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

71
75/386

Characteristic of treated material sensed (e.g., density, etc.)

51
75/384

Composition sensed

55
75/385

Of waste gas

51
75/387

Flow rate sensed

56
75/378

Pressure sensed

26
75/379

Of feed gas

18
75/376

Removing material from process to sense condition

20
75/377

Material removed is molten metal

17
75/380

Temperature sensed

35
75/382

Of molten metal

40
75/383

Of sintered material

1
75/381

Of waste gas

23
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)

155
75/363

At 300 degrees c or greater

86
75/364

Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions

41
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

101
75/369

Purifying powdered metal or reducing powdered metal compound to free metal

170
75/368

Settling of powder in molten metal or salt bath

28
75/366

Utilizing a fluidized bed

22
75/367

Vaporizing or condensing free metal

65
75/362

Decomposition of organo-compound containing metal or metal carbonyl

146
75/354

Including comminution

61
75/356

And shaping or sintering prior to comminution

45
75/355

Directly from liquid mass (e.g., by atomizing, etc.)

43
75/361

Using nonmetallic material which is liquid under standard conditions

27
75/357

With step at 300 degrees c or greater

25
75/359

Reduction

50
75/360

Use of gas

33
75/358

Use of salt bath

9
75/351

Producing alloy

255
75/352

Including comminution

122
75/348

Producing or purifying named magnetic material

133
75/350

Using alkaline earth metal or compound thereof

24
75/349

Using phosphorus(p), boron(b), or silicon(si) or compound thereof

93
75/344

Radioactive

17
75/370

Using nonmetallic material which is liquid under standard conditions

150
75/371

And settling of free metal from solution

171
75/373

Copper(cu) recovered

61
75/372

Displacing by another metal (i.e., electromotive series)

7
75/374

Nickel(ni) or cobalt(co) recovered

67
75/345

Utilizing electrothermic, magnetic, or wave energy

105
75/347

Utilizing magnetism

44
75/346

Utilizing plasma

99
75/353

Utilizing scrap material

33
75/392

Producing or treating free metal

59
75/406

Adsorbing impurity from vaporous or liquid metal

12
75/414

At 300 degrees c or greater (e.g., pyrometallurgy, etc.)

203
75/416

Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.)

58
75/429

Copper(cu) obtained

33
75/430

Iron(fe), cobalt(co), or nickel(ni) obtained

60
75/426

Noble metal obtained

36
75/428

Gold(au)

20
75/427

Silver(ag)

23
75/418

Obtaining metal from electrolytic slime

10
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

72
75/420

Step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions is reduction to free metal

24
75/424

Copper(cu)

17
75/425

Iron(fe), cobalt(co), or nickel(ni)

16
75/421

Noble metal

22
75/423

Gold(au)

18
75/422

Silver(ag)

18
75/432

Tin(sn) or lead(pb) obtained

29
75/431

Zinc(zn), cadmium(cd), or mercury(hg) obtained

23
75/709

Covering the surface of molten metal

39
75/415

Foam

38
75/433

Iron(fe)

44
75/458

Blast furnace reduction to produce molten iron(fe)

32
75/472

Defined composition of iron(fe) source

18
75/471

Defined composition of reductant

25
75/470

Defined composition of slag

5
75/469

Specified method of charging burden

18
75/467

Tapping molten product

9
75/468

Top gas recovery

29
75/459

Using additive to the blast

11
75/460

Carbonaceous

34
75/463

Gaseous

13
75/464

Recycled off gas

12
75/462

Liquid

2
75/461

Slurry of solid in liquid

5
75/466

Oxygen enrichment

24
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

23
75/526

Adding solid treating agent in form of wire, rod, or article with surface feature or in container or by plunging means

78
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)

6
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

5
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

1
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

50
75/531

And adding solid agent, slag, or flux to premelted iron(fe) or slag layer thereon

42
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.)

83
75/546

Noble gas or inert gas not otherwise identified

34
75/533

With solid entrained in gas or injected by gas pressure

53
75/539

Alkali metal compound or alkaline earth metal compound used in process

52
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

19
75/535

Metal halide used in process

27
75/559

Gas compound containing oxygen (e.g., carbon monoxide, carbon dioxide, water, etc.)

24
75/548

Gas contains gaseous oxygen

37
75/551

Injecting from above and below melt surface

22
75/552

Including other gas from below

36
75/553

Injecting only from above melt surface

33
75/554

Including other gas from above

15
75/555

Including other gas from below

26
75/556

Injecting only from below melt surface

15
75/557

Including other gas from below

29
75/549

With treatment of exhaust gas

20
75/550

And adding gaseous oxygen or inert gas to exhaust gas

13
75/558

Noble gas or inert gas not otherwise identified

34
75/529

With hydrocarbon liquid or gas present

42
75/530

And hydrocarbon in surrounding relationship to gaseous oxygen (e.g., hydrocarbon in outer concentric tube, etc.)

60
75/571

Melting solid iron(fe)

29
75/580

In closed vessel with heat conducted through walls only (e.g., crucible melting, etc.)

3
75/573

In shaft furnace (e.g., cupola, etc.)

18
75/577

Defined composition of solid fuel other than nominal "coke"

11
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

10
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.)

14
75/581

Melting scrap

90
75/584

Pouring or tapping molten iron(fe)

51
75/582

Separating slag from molten iron(fe)

44
75/524

Sequential treatment of molten iron(fe) in plural apparatus with different linings (e.g., acid bessemer followed by basic bessemer, etc.)

4
75/583

Stirring or agitating molten iron(fe)

33
75/560

Treating premelted iron(fe) or slag layer thereon by adding solid agent, slag, or flux

80
75/570

Alkali metal compound or alkaline earth metal compound

50
75/564

Boron(b) or compound thereof

16
75/566

Carbide

32
75/567

Elemental metal or elemental silicon(si)

68
75/568

Aluminum(al) or magnesium(mg)

92
75/569

Iron(fe) containing compound

32
75/561

Loose elemental carbon(c), coal, or coke (e.g., carburizing, etc.)

32
75/565

Metal halide

25
75/563

Nitrate, chlorate, permanganate, or peroxide

1
75/562

Sulfur(s) or compound thereof

13
75/508

Vacuum treatment of molten iron(fe)

67
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

68
75/484

Moving furnace or hearth (e.g., moving belt, etc.)

109
75/485

Reduction in molten state

17
75/443

Reducing in gaseous suspension

27
75/453

Cyclone apparatus used

28
75/444

Fluidized bed

56
75/450

Using plural fluidized bed furnaces

50
75/451

Using plural fluidized bed zones within a furnace

15
75/445

With melting of iron(fe)

33
75/446

Outside the fluidized bed

70
75/447

With solid in fluidized bed in addition to reducible iron(fe) compound

14
75/448

Carbon(c)

32
75/449

Generated in situ

2
75/452

Solid product produced (without melting)

7
75/454

Using same inlet to feed solid and gas

10
75/457

Inlet feeds upwardly

1
75/455

Inlet is a burner

11
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

97
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.)

68
75/504

Including consolidation of solid carbon(c) containing material with reducible iron(fe) compound

49
75/474

Reduction in rotary kiln

16
75/477

Introducing solid reductant into rotary kiln

25
75/479

Any part of the charge is consolidated by agglomerating, compacting, indurating, or sintering (e.g., pelletized ore, flux, or reductant, etc.)

23
75/480

Reducible iron(fe) compound and solid reductant fed through same end of rotary kiln

12
75/481

Mixed prior to charging

10
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

9
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

13
75/489

Externally supplied gas reductant

10
75/490

Solid iron(fe) produced within shaft furnace

52
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.)

10
75/494

Solid carbon(c) is coal

14
75/491

With melting iron(fe) product outside shaft furnace

21
75/492

With gasification of solid carbonaceous material in melt (e.g., coal, etc.)

67
75/496

With reformation of reducing gas in separate furnace (e.g., midrex process, etc.)

56
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

21
75/505

Reduction with externally applied gas (e.g., batch hyl process, etc.)

79
75/483

Superposed multiple hearth reduction

13
75/434

With concurrent production of hydraulic cement

24
75/435

With concurrent production of titanium dioxide

23
75/436

With consolidation (e.g., pelletizing, etc.) of solid metallic iron(fe) product after reduction

50
75/585

Nonferrous

64
75/589

Alkali metal, singly or in combination

18
75/592

Precipitating impurities from molten alkali metal

7
75/590

Vaporizing or condensing

17
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

3
75/608

Reduction

7
75/671

Aluminum(al)

21
75/686

Melting aluminum(al)

43
75/687

Scrap

84
75/673

Reduction

12
75/674

Carbothermic

47
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)

56
75/680

Adding gas

68
75/683

And solid

27
75/681

Containing halogen atom

60
75/682

And adding solid

15
75/684

Adding solid

65
75/685

Containing halogen

35
75/679

Fractional crystallization

22
75/672

Treating slag or dross

65
75/703

Antimony(sb)

10
75/704

Reduction

9
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

28
75/626

Cobalt(co)

27
75/627

Reduction

34
75/586

Concurrent production of nonferrous metal and other desired nonmetallic product (e.g., cement, etc.)

25
75/638

Copper(cu)

23
75/653

Melting copper(cu) in shaft furnace

12
75/641

Reduction

40
75/642

Segregation process

3
75/643

Treating matte or sulfide

65
75/644

Treating waste gas

16
75/645

With prior production of matte or sulfide

37
75/639

Treating material in gaseous suspension

43
75/646

Treating molten copper(cu)

14
75/648

Adding gas

21
75/651

And solid

5
75/649

Containing gaseous oxygen

26
75/650

And adding solid

13
75/652

Adding solid

17
75/647

By vacuum

6
75/640

Treating slag or dross

43
75/587

Countercurrent liquid-liquid extraction of molten nonferrous metal

5
75/588

Fractionation of molten nonferrous metal (e.g., with reflux, etc.)

19
75/688

Gallium(ga) or indium(in)

18
75/689

Germanium(ge)

9
75/693

Lead(pb)

31
75/695

Reduction

53
75/696

Of lead-sulfur compound

53
75/694

Treating material in gaseous suspension or gaseous state

33
75/697

Treating molten lead(pb)

19
75/699

Adding gas

17
75/700

Containing halogen atom

3
75/701

Adding solid

18
75/702

Containing free metal

19
75/698

By vacuum

0
75/594

Magnesium(mg)

21
75/600

Treating molten magnesium(mg)

20
75/602

Adding gas

19
75/603

And solid

10
75/604

Adding solid

21
75/601

Precipitating impurities from molten magnesium(mg)

7
75/595

Vaporizing or condensing

14
75/596

Reduction

7
75/599

Using carbon(c)

8
75/597

Using metal or metal compound reductant

19
75/598

And carbon(c)

5
75/624

Manganese(mn)

12
75/625

Reduction

17
75/670

Mercury(hg)

47
75/628

Nickel(ni)

50
75/629

Reduction

88
75/630

Segregation process

2
75/631

Noble metal, singly or in combination

33
75/637

Gold(au)

30
75/632

Palladium(pd)

14
75/633

Platinum(pt)

28
75/634

Silver(ag)

32
75/635

Recovering silver(ag) from photographic material

3
75/636

Reduction

13
75/610

Rare earth metal, singly or in combination

21
75/611

Refractory metal, singly or in combination

6
75/623

Chromium(cr), molybdenum(mo), or tungsten(w), singly or in combination

93
75/612

Titanium(ti), zirconium(zr), or hafnium(hf), singly or in combination

40
75/613

Reduction

12
75/620

Of titanium(ti), zirconium(zr), or hafnium(hf) compound containing halogen

20
75/614

Using free metal or alloy reductant

10
75/615

Of titanium(ti), zirconium(zr), or hafnium(hf), compound containing halogen

10
75/616

Of binary halide - mx(4)

11
75/617

Of chloride - mc1(4)

22
75/618

Free metal or alloy reductant contains magnesium(mg)

26
75/619

Metal produced is titanium(ti)

26
75/621

Treating molten titanium(ti), zirconium(zr), or hafnium(hf)

15
75/622

Vanadium(v), niobium(nb) or columbium(cb), or tantalum(ta), singly or in combination

59
75/690

Tin(sn)

32
75/691

Reduction

18
75/692

Of halogen containing material

5
75/654

Zinc(zn)

12
75/656

Reduction

24
75/657

Using halogen containing material

2
75/658

Vaporizing or condensing

46
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

6
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

17
75/666

Condensing with lead(pb) coolant

6
75/667

Condensing with use of molten metal slinger

0
75/655

Treating slag or dross

24
75/707

Reducing or smelting unnamed ore

36
75/708

Stirring or agitating of molten material

80
75/710

Below 300 degrees c

82
75/745

Alkali metal, singly or in combination

10
75/711

Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.)

119
75/742

Cleaning, leaching, or dissolving of mercury(hg)

30
75/724

Displacing by another metal (i.e., electromotive series)

89
75/726

Copper(cu) recovered as free metal

73
75/727

And flotation

3
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

14
75/725

Lead(pb) or zinc(zn) recovered as free metal

55
75/738

Nickel(ni) or cobalt(co) recovered as free metal

36
75/732

Noble metal recovered as free metal

34
75/736

Gold(au) recovered as free metal

63
75/737

From cyanide solution

31
75/733

Silver(ag) recovered as free metal

70
75/734

And injecting or pressurizing with air or oxygen

11
75/735

From cyanide solution

19
75/714

From electrolytic or cementation slime

36
75/713

From photography material

74
75/712

Involving mining or in situ operation

111
75/722

Involving organic compound containing metal or organic agent for agglomerating metal

128
75/723

Natural or synthetic polymer

42
75/717

Reducing to free metal with gas

26
75/718

Copper (cu) recovered as free metal

31
75/719

Using sulfur dioxide

3
75/720

Noble metal recovered as free metal

25
75/715

Removing coating to recover free metal from substrate or coating

35
75/716

From tin(sn) scrap or tin plate

0
75/739

Utilizing chemical agent to precipitate free metal

73
75/740

Copper(cu) recovered as free metal

44
75/741

Noble metal recovered as free metal

80
75/721

Utilizing organic reducing agent

75
75/743

With leaching or dissolving

291
75/744

Noble metal recovered as free metal

239
75/407

Filtering vaporous or liquid metal

81
75/408

Alkali metal, singly or in combination

12
75/412

Aluminum(al)

69
75/411

Copper(cu)

18
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

23
75/405

Removing gas from liquid metal by use of gas permeable membrane

7
75/404

Separating liquid metal by centrifuging

14
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

64
75/403

Removing nonmetal from metal

70
75/402

Utilizing molten salt bath

8
75/393

Utilizing radioactive material, producing or treating radioactive metal

34
75/396

Plutonium(pu)

9
75/397

Reduction

12
75/394

Thorium(th)

6
75/395

Reduction

9
75/398

Uranium(u)

25
75/399

Reduction

32
75/331

Producing solid particulate free metal directly from liquid metal (e.g., liquid comminuting, etc.)

102
75/340

By extrusion spraying or gravity fall through orifice

64
75/341

Into moving fluid

16
75/338

By impinging or atomizing with gaseous jet or blast

213
75/339

Gas used is air

29
75/337

By impinging plural liquid streams

60
75/335

By vibrating or agitating

49
75/333

Utilizing centrifugal force or rotating forming zone to comminute liquid metal

41
75/334

Including directing liquid metal onto rotating disc

45
75/336

Utilizing electrothermic energy to comminute

60
75/332

With subsequent coating of the particles

44
75/342

Spheroidizing or rounding of existing solid metal particles

58
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)

172
75/962

Treating or using mill scale

43
75/958

With concurrent production of iron(fe) and other desired nonmetallic product (e.g., energy, fertilizer, etc.)

84
 
 
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