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Class Information
Number: 420/345
Name: Alloys or metallic compositions >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
420/1	Radioactive	18
420/400	Alkali metal base	30
420/401	Beryllium base	21
420/402	Magnesium base	82
420/415	Alkaline earth metal base	16
420/416	Rare earth metal base singly or in combination	103
420/417	Titanium base	223
420/422	Zirconium or hafnium base	200
420/424	Vanadium base	43
420/425	Niobium base	69
420/427	Tantalum base	85
420/428	Chromium base	100
420/429	Molybdenum base	94
420/430	Tungsten base	69
420/433	Rhenium base	27
420/434	Manganese base	63
420/435	Cobalt base	219
420/441	Nickel base	161
420/461	Osmium or iridium base	36
420/462	Ruthenium or rhodium base	46
420/463	Palladium base	98
420/466	Platinum base	91
420/469	Copper base	97
420/501	Silver base	86
420/507	Gold base	89
420/513	Zinc base	57
420/525	Cadmium base	17
420/526	Mercury base	34
420/528	Aluminum base	234
420/555	Gallium, indium, or thallium base	75
420/556	Germanium base	21
420/557	Tin base	106
420/563	Lead base	31
420/576	Antimony base	31
420/577	Bismuth base	38
420/578	Silicon base alloy containing metal	98
420/579	Arsenic base or selenium or tellurium base alloy containing metal	52
420/580	Containing over 50 per cent metal but no base metal	268
420/590	Processes	410
420/591	Miscellaneous	10
420/8	Ferrous (i.e., iron base)	103
420/900	Hydrogen storage	462
420/901	Superconductive	78
420/902	Superplastic	80
420/903	Semiconductive	40