| Class Number |
Class Name |
No. of Patents |
| 501/1 |
Ceramic compositions |
298 |
| 501/153 |
Aluminum compound containing |
817 |
| 501/87 |
Carbide or oxycarbide containing |
532 |
| 501/93 |
Plural carbides (i.e., carbides of plural metals) containing |
142 |
| 501/88 |
Silicon carbide |
644 |
| 501/89 |
And aluminum compound |
371 |
| 501/92 |
And boride, silicide, nitride, or oxynitride |
471 |
| 501/90 |
And carbonaceous material |
280 |
| 501/91 |
And different carbide |
146 |
| 501/141 |
Clay containing (e.g., porcelain, earthenware, etc.) |
222 |
| 501/143 |
And flint or feldspar |
44 |
| 501/144 |
Kaolin (e.g., ball clay, fire clay, etc.) containing |
104 |
| 501/142 |
And phosphorus (e.g., bone china, etc.) |
30 |
| 501/145 |
Clay pretreatment |
123 |
| 501/146 |
Chemical pretreatment |
124 |
| 501/147 |
Using alkaline compound treating agent |
94 |
| 501/148 |
Using organic substance as treating agent |
195 |
| 501/150 |
Heat pretreatment |
51 |
| 501/149 |
Water pretreatment |
64 |
| 501/155 |
Composed of waste material |
206 |
| 501/2 |
Devitrified glass-ceramics |
66 |
| 501/5 |
Binary, ternary, quaternary, etc., metal silicate crystalline phase (e.g., mullite, diopside, sphene, plagioclase, slagcerams free of alumina, etc.) |
260 |
| 501/6 |
Alkali metal aluminosilicate crystalline phase |
70 |
| 501/7 |
Lithium aluminosilicate (e.g., spodumeme, eucryptite, petalite, etc.) |
176 |
| 501/8 |
Divalent metal oxide aluminosilicate crystalline phase (e.g., anorthite, slagcerams, etc.) |
124 |
| 501/9 |
Magnesium aluminosilicate (e.g., cordierite, etc.) |
175 |
| 501/3 |
Halogen containing crystalline phase (e.g., fluormica, etc.) |
99 |
| 501/10 |
Nonsilica and nonsilicate crystalline phase (e.g., spinel, barium titanate, etc.) |
259 |
| 501/4 |
Silica containing crystalline phase (e.g., stuffed quartz, crystobalite, etc.) |
236 |
| 501/140 |
Elemental sulfur containing |
25 |
| 501/151 |
Fluorine containing |
105 |
| 501/11 |
Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions |
100 |
| 501/33 |
Beads |
97 |
| 501/34 |
Reflective |
28 |
| 501/14 |
Enamels, glazes, or fusion seals (e.g., raw, fritted, or calcined ingredients) |
120 |
| 501/21 |
Chemically specified frit compositions |
244 |
| 501/25 |
Halogen containing |
75 |
| 501/22 |
Lead containing |
112 |
| 501/23 |
And titanium or zirconium |
35 |
| 501/24 |
Phosphorous containing |
90 |
| 501/26 |
Zinc containing |
161 |
| 501/17 |
Frit plus material other than glass (e.g., color, opacifier, mill additions, etc.) |
387 |
| 501/19 |
Free metal as other material |
131 |
| 501/18 |
Titanium or zirconium compound as other material |
129 |
| 501/20 |
With vehicle or suspending agent (i.e., slip) |
212 |
| 501/15 |
Fusion seals (frit plus material other than glass) |
238 |
| 501/16 |
Plural diverse frits |
84 |
| 501/35 |
Fibers |
234 |
| 501/36 |
Mineral fibers (e.g., slag wool, rock wool, mineral wool, etc.) |
138 |
| 501/37 |
Optical fibers |
182 |
| 501/38 |
Titanium or zirconium containing |
138 |
| 501/32 |
Glass and material other than glass (e.g., crystal glass, opal glass, etc.) |
715 |
| 501/27 |
Glass batch forming compositions (i.e., glass batch compositions) |
118 |
| 501/30 |
Halogen containing |
46 |
| 501/29 |
Pellet or agglomerate containing |
55 |
| 501/28 |
Slag containing |
21 |
| 501/31 |
Uncombined silica containing (e.g., sand) |
53 |
| 501/12 |
Made by gel route |
529 |
| 501/40 |
Nonoxide glasses (e.g., fluoride glasses, etc.) |
141 |
| 501/41 |
Nonsilicate oxide glasses |
98 |
| 501/49 |
Boron containing |
116 |
| 501/52 |
And aluminum or beryllium |
80 |
| 501/50 |
And yttrium or rare earth (i.e., elements with atomic numbers 39, 57-71, or 89+) |
78 |
| 501/51 |
And zirconium, titanium, tantalum, or niobium |
65 |
| 501/42 |
Germanium containing |
86 |
| 501/43 |
Halogen containing |
68 |
| 501/44 |
Fluorine and phosphorus containing |
97 |
| 501/45 |
Phosphorus containing |
177 |
| 501/48 |
And aluminum or beryllium |
174 |
| 501/47 |
And boron |
133 |
| 501/46 |
And titanium, zirconium, vanadium, tungsten, or molybdenum |
117 |
| 501/39 |
Pore-forming |
145 |
| 501/13 |
Radiation color change responsive |
158 |
| 501/53 |
Silica containing |
136 |
| 501/55 |
40 percent - 90 percent by weight silica |
169 |
| 501/68 |
And aluminum or iron compound |
199 |
| 501/69 |
And divalent metal oxide (e.g., oxides of zinc, cadmium, beryllium, alkaline earth metal, magnesium, etc.) |
481 |
| 501/70 |
Calcium oxide containing |
650 |
| 501/71 |
And chromium, nickel, or cobalt |
246 |
| 501/65 |
And boron |
289 |
| 501/66 |
And aluminum |
526 |
| 501/67 |
And zinc or zirconium |
366 |
| 501/72 |
And divalent metal oxide (e.g., oxides of zinc, cadmium, beryllium, alkaline earth metal, magnesium, etc.) |
339 |
| 501/56 |
And halogen or nitrogen |
132 |
| 501/57 |
Fluorine |
175 |
| 501/58 |
And boron |
75 |
| 501/59 |
And aluminum |
196 |
| 501/60 |
And lead |
84 |
| 501/62 |
And aluminum |
147 |
| 501/61 |
And boron |
120 |
| 501/63 |
And phosphorus, niobium, or tantalum |
269 |
| 501/64 |
And yttrium or rare earth (i.e., elements with atomic numbers 39 or 57-71) |
395 |
| 501/73 |
Less than 40 percent by weight silica |
308 |
| 501/77 |
And boron |
303 |
| 501/78 |
And rare earth (i.e., elements with atomic number 39 or 57-71) |
207 |
| 501/79 |
And zinc |
253 |
| 501/74 |
And lead |
95 |
| 501/75 |
And boron |
132 |
| 501/76 |
And zinc |
150 |
| 501/54 |
More than 90 percent by weight silica |
240 |
| 501/80 |
Pore-forming |
348 |
| 501/84 |
By gas blowing, foaming agent, or in situ reactive gas generation |
147 |
| 501/81 |
By use of organic combustible material |
119 |
| 501/82 |
Of resin or vegetable origin material |
68 |
| 501/83 |
Of cellulosic material |
44 |
| 501/85 |
By volatilizing or heat expansion of water or other noncombustible material |
78 |
| 501/94 |
Refractory |
269 |
| 501/123 |
Alkaline earth metal compound containing |
381 |
| 501/125 |
And aluminum compound |
131 |
| 501/124 |
Hydraulic cement containing |
93 |
| 501/96.1 |
Boride, silicide, nitride, oxynitride, carbonitride, or oxycarbonitride containing |
289 |
| 501/98.4 |
Aluminum nitride containing (ain) |
206 |
| 501/98.6 |
Composites (continuous matrix with dispersed phase) |
86 |
| 501/98.5 |
With alkaline earth metal compound |
72 |
| 501/96.3 |
Boride or silicide containing |
308 |
| 501/96.4 |
Boron nitride containing |
221 |
| 501/96.2 |
From organometallic precursor |
148 |
| 501/98.1 |
Silicon aluminum oxynitride containing (i.e., siaion compounds) |
102 |
| 501/98.3 |
Composites (continuous matrix with dispersed phase) |
73 |
| 501/98.2 |
With rare earth or alkaline earth metal compound |
76 |
| 501/97.1 |
Silicon nitride containing (si3n4) |
288 |
| 501/97.4 |
Composites (continuous matrix with dispersed phase) |
190 |
| 501/97.2 |
With trivalent metal compound (e.g., yttrium, rare earth, or aluminum compound, etc.) |
285 |
| 501/97.3 |
With alkaline earth metal compound |
132 |
| 501/96.5 |
Silicon oxynitride, silicon carbonitride, or silicon oxycarbonitride containing (i.e., siaobnc, siacbnc, or siaobccnd) |
86 |
| 501/99 |
Elemental carbon containing |
200 |
| 501/101 |
And alkaline earth metal or magnesium compound (e.g., dolomite, magnesium oxide, etc.) |
91 |
| 501/100 |
And aluminum compound (e.g., clay, aluminum oxide, etc.) |
158 |
| 501/95.1 |
Fiber or fiber containing |
433 |
| 501/95.2 |
Composites (continuous matrix with dispersed fiber phase) |
254 |
| 501/95.3 |
Whisker containing |
176 |
| 501/108 |
Magnesium compound containing |
212 |
| 501/118 |
And aluminum compound |
139 |
| 501/119 |
Aluminum compound other than clay |
262 |
| 501/120 |
Spinel or other aluminate |
185 |
| 501/117 |
And chromium compound |
64 |
| 501/112 |
And iron compound |
76 |
| 501/114 |
And chromium compound |
22 |
| 501/116 |
Chemical binder containing |
9 |
| 501/115 |
Fused cast or fused material containing |
16 |
| 501/113 |
Dolomite containing |
24 |
| 501/111 |
And phosphorus compound |
87 |
| 501/122 |
And silicon compound |
126 |
| 501/121 |
Less than 90 percent by weight magnesium compound |
95 |
| 501/109 |
With organic material in starting mixture |
89 |
| 501/110 |
And iron or chromium compound |
25 |
| 501/133 |
Silica containing |
328 |
| 501/126 |
Trivalent metal compound (e.g., iron oxide, chromium oxide, trivalent rare earth oxide, etc.) containing |
288 |
| 501/127 |
Aluminum compound (e.g., clay, aluminium oxide, etc.) |
866 |
| 501/128 |
And silicon compound other than clay |
534 |
| 501/130 |
And clay containing |
50 |
| 501/131 |
Less than 40 percent by weight clay |
35 |
| 501/129 |
And silica-clay mixtures |
59 |
| 501/132 |
Chromium compound containing |
114 |
| 501/102 |
Zirconium compound containing |
168 |
| 501/103 |
Zirconium oxide |
533 |
| 501/104 |
And alkaline earth metal or magnesium compound |
269 |
| 501/105 |
And aluminum compound (e.g., clay, aluminum oxide, etc.) |
339 |
| 501/106 |
Zirconium silicate |
84 |
| 501/107 |
And aluminum compound (e.g., clay, aluminum oxide, etc.) |
62 |
| 501/154 |
Silicon compound containing |
401 |
| 501/86 |
Synthetic precious stones (e.g., single crystals, etc.) |
115 |
| 501/134 |
Titanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.) |
821 |
| 501/135 |
Alkaline earth or magnesium containing |
448 |
| 501/136 |
Titanate containing |
571 |
| 501/137 |
Barium titanate |
408 |
| 501/138 |
And divalent metal oxide other than alkaline earth oxide or magnesium oxide |
364 |
| 501/139 |
And trivalent metal oxide |
382 |
| 501/152 |
Yttrium, lanthanide, actinide, or transactinide containing (i.e., atomic numbers 39 or 57-71 or 89+) |
707 |
| 501/900 |
Optical glass (e.g., silent on refractive index and/or abbe number) |
76 |
| 501/902 |
Having abbe number at least 70 |
18 |
| 501/901 |
Having r.i. at least 1.8 |
65 |
| 501/903 |
Having refractive index less than 1.8 and abbe number less than 70 |
175 |
| 501/904 |
Infrared transmitting or absorbing |
165 |
| 501/906 |
Thorium oxide containing |
9 |
| 501/905 |
Ultraviolet transmitting or absorbing |
144 |
