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CLASS 501 COMPOSITIONS: 501 - 1

1 CERAMIC COMPOSITIONS 25 ....Halogen containing 2 .Devitrified - 26 ....Zinc containing 3 ..Halogen containing crystalline 27 ..Glass batch forming phase (e.g., fluormica, etc.) compositions (i.e., glass 4 ..Silica containing crystalline batch compositions) phase (e.g., stuffed , 28 ...Slag containing crystobalite, etc.) 29 ...Pellet or agglomerate 5 ..Binary, ternary, quaternary, containing etc., metal silicate 30 ...Halogen containing crystalline phase (e.g., 31 ...Uncombined silica containing mullite, diopside, sphene, (e.g., ) plagioclase, slagcerams free 32 ..Glass and material other than of alumina, etc.) glass (e.g., crystal glass, 6 ...Alkali metal aluminosilicate opal glass, etc.) crystalline phase 33 ..Beads 7 ....Lithium aluminosilicate 34 ...Reflective (e.g., spodumeme, eucryptite, 35 ..Fibers petalite, etc.) 36 ...Mineral fibers (e.g., slag 8 ...Divalent metal oxide wool, rock wool, mineral wool, aluminosilicate crystalline etc.) phase (e.g., anorthite, 37 ...Optical fibers slagcerams, etc.) 38 ...Titanium or 9 ....Magnesium aluminosilicate containing (e.g., cordierite, etc.) 39 ..Pore-forming 10 ..Nonsilica and nonsilicate 40 ..Nonoxide (e.g., crystalline phase (e.g., fluoride glasses, etc.) spinel, barium titanate, etc.) 41 ..Nonsilicate oxide glasses 11 .Glass compositions, compositions 42 ...Germanium containing containing glass other than 43 ...Halogen containing those wherein glass is a 44 ....Fluorine and phosphorus bonding agent, or glass batch containing forming compositions 45 ...Phosphorus containing 12 ..Made by gel route 46 ....And titanium, zirconium, 13 ..Radiation color change vanadium, tungsten, or responsive molybdenum 14 ..Enamels, glazes, or fusion 47 ....And boron seals (e.g., raw, fritted, or 48 ....And aluminum or beryllium calcined ingredients) 49 ...Boron containing 15 ...Fusion seals (frit plus 50 ....And yttrium or rare earth material other than glass) (i.e., elements with atomic 16 ...Plural diverse frits numbers 39, 57-71, or 89+) 17 ...Frit plus material other than 51 .....And zirconium, titanium, glass (e.g., color, opacifier, tantalum, or niobium mill additions, etc.) 52 ....And aluminum or beryllium 18 ....Titanium or zirconium 53 ..Silica containing compound as other material 54 ...More than 90 percent by weight 19 ....Free metal as other material silica 20 ....With vehicle or suspending 55 ...40 percent - 90 percent by agent (i.e., ) weight silica 21 ...Chemically specified frit 56 ....And halogen or nitrogen compositions 57 .....Fluorine 22 ....Lead containing 58 ...... And boron 23 .....And titanium or zirconium 59 ...... And aluminum 24 ....Phosphorous containing

March 2005 501 - 2 CLASS 501 COMPOSITIONS: CERAMIC

60 ....And lead 93 ..Plural carbides (i.e., carbides 61 .....And boron of plural metals) containing 62 .....And aluminum 94 .Refractory 63 ....And phosphorus, niobium, or 95.1 ..Fiber or fiber containing tantalum 95.2 ...Composites (continuous matrix 64 ....And yttrium or rare earth with dispersed fiber phase) (i.e., elements with atomic 95.3 ....Whisker containing numbers 39 or 57-71) 96.1 ..Boride, silicide, nitride, 65 ....And boron oxynitride, carbonitride, or 66 .....And aluminum oxycarbonitride containing 67 ...... And zinc or zirconium 96.2 ...From organometallic precursor 68 ....And aluminum or iron compound 96.3 ...Boride or silicide containing 69 .....And divalent metal oxide 96.4 ...Boron nitride containing (e.g., oxides of zinc, 96.5 ...Silicon oxynitride, silicon cadmium, beryllium, alkaline carbonitride, or silicon earth metal, magnesium, etc.) oxycarbonitride containing 70 ...... containing (i.e., SiAOBNC, SiACBNC, or 71 ...... And chromium, nickel, or SiAOBCcND) 97.1 ...Silicon nitride containing 72 ....And divalent metal oxide (Si3N4) (e.g., oxides of zinc, 97.2 ....With trivalent metal compound cadmium, beryllium, alkaline (e.g., yttrium, rare earth, or earth metal, magnesium, etc.) aluminum compound, etc.) 73 ...Less than 40 percent by weight 97.3 .....With silica compound 74 ....And lead 97.4 ....Composites (continuous matrix 75 .....And boron with dispersed phase) 76 ...... And zinc 98.1 ...Silicon aluminum oxynitride 77 ....And boron containing (i.e., SiAION 78 .....And rare earth (i.e., compounds) elements with atomic number 39 98.2 ....With rare earth or alkaline or 57-71) earth metal compound 79 .....And zinc 98.3 ....Composites (continuous matrix 80 .Pore-forming with dispersed phase) 81 ..By use of organic combustible 98.4 ...Aluminum nitride containing material (AIN) 82 ...Of resin or vegetable origin 98.5 ....With alkaline earth metal material compound 83 ....Of cellulosic material 98.6 ....Composites (continuous matrix 84 ..By gas blowing, foaming agent, with dispersed phase) or in situ reactive gas 99 ..Elemental carbon containing generation 100 ...And aluminum compound (e.g., 85 ..By volatilizing or heat clay, aluminum oxide, etc.) expansion of water or other 101 ...And alkaline earth metal or noncombustible material magnesium compound (e.g., 86 .Synthetic precious stones (e.g., dolomite, magnesium oxide, single crystals, etc.) etc.) 87 .Carbide or oxycarbide containing 102 ..Zirconium compound containing 88 ..Silicon carbide 103 ...Zirconium oxide 89 ...And aluminum compound 104 ....And alkaline earth metal or 90 ...And carbonaceous material magnesium compound 91 ...And different carbide 105 ....And aluminum compound (e.g., 92 ...And boride, silicide, nitride, clay, aluminum oxide, etc.) or oxynitride 106 ...Zirconium silicate

March 2005 CLASS 501 COMPOSITIONS: CERAMIC 501 - 3

107 ....And aluminum compound (e.g., 141 .Clay containing (e.g., clay, aluminum oxide, etc.) , , etc.) 108 ..Magnesium compound containing 142 ..And phosphorus (e.g., bone 109 ...With organic material in china, etc.) starting mixture 143 ..And flint or feldspar 110 ....And iron or chromium compound 144 ...Kaolin (e.g., , fire 111 ...And phosphorus compound clay, etc.) containing 112 ...And iron compound 145 ..Clay pretreatment 113 ....Dolomite containing 146 ...Chemical pretreatment 114 ....And chromium compound 147 ....Using alkaline compound 115 .....Fused cast or fused material treating agent containing 148 ....Using organic substance as 116 .....Chemical binder containing treating agent 117 ...And chromium compound 149 ...Water pretreatment 118 ...And aluminum compound 150 ...Heat pretreatment 119 ....Aluminum compound other than 151 .Fluorine containing clay 152 .Yttrium, lanthanide, actinide, 120 .....Spinel or other aluminate or transactinide containing 121 ...Less than 90 percent by weight (i.e., atomic numbers 39 or magnesium compound 57-71 or 89+) 122 ...And silicon compound 153 .Aluminum compound containing 123 ..Alkaline earth metal compound 154 .Silicon compound containing containing 155 .Composed of waste material 124 ...Hydraulic cement containing 125 ...And aluminum compound 126 ..Trivalent metal compound (e.g., iron oxide, chromium oxide, CROSS-REFERENCE ART COLLECTIONS trivalent rare earth oxide, etc.) containing 900 OPTICAL GLASS (E.G., SILENT ON 127 ...Aluminum compound (e.g., clay, REFRACTIVE INDEX AND/OR ABBE aluminium oxide, etc.) NUMBER) 128 ....And silicon compound other 901 .Having R.I. at least 1.8 than clay 902 .Having Abbe number at least 70 129 .....And silica-clay mixtures 903 .Having refractive index less 130 .....And clay containing than 1.8 and Abbe number less 131 ...... Less than 40 percent by than 70 weight clay 904 .Infrared transmitting or 132 ...Chromium compound containing absorbing 133 ..Silica containing 905 .Ultraviolet transmitting or 134 .Titanate, zirconate, stannate, absorbing niobate, or tantalate or oxide 906 .Thorium oxide containing of titanium, zirconium, , niobium, or tantalum containing (e.g., dielectrics, etc.) FOREIGN ART COLLECTIONS 135 ..Alkaline earth or magnesium containing FOR 000 CLASS-RELATED FOREIGN DOCUMENTS 136 ...Titanate containing 137 ....Barium titanate 138 .....And divalent metal oxide other than alkaline earth oxide or magnesium oxide 139 .....And trivalent metal oxide 140 .Elemental sulfur containing

March 2005