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Class Information
Number: 420/138
Name: Alloys or metallic compositions >
Description:










Sub-classes under this class:

Class Number Class Name Patents
420/1 Radioactive 19
420/400 Alkali metal base 31
420/401 Beryllium base 21
420/402 Magnesium base 83
420/415 Alkaline earth metal base 16
420/416 Rare earth metal base singly or in combination 108
420/417 Titanium base 229
420/422 Zirconium or hafnium base 205
420/424 Vanadium base 45
420/425 Niobium base 69
420/427 Tantalum base 85
420/428 Chromium base 103
420/429 Molybdenum base 94
420/430 Tungsten base 71
420/433 Rhenium base 27
420/434 Manganese base 64
420/435 Cobalt base 222
420/441 Nickel base 169
420/461 Osmium or iridium base 37
420/462 Ruthenium or rhodium base 46
420/463 Palladium base 98
420/466 Platinum base 95
420/469 Copper base 99
420/501 Silver base 89
420/507 Gold base 92
420/513 Zinc base 61
420/525 Cadmium base 17
420/526 Mercury base 34
420/528 Aluminum base 237
420/555 Gallium, indium, or thallium base 76
420/556 Germanium base 22
420/557 Tin base 111
420/563 Lead base 32
420/576 Antimony base 31
420/577 Bismuth base 40
420/578 Silicon base alloy containing metal 100
420/579 Arsenic base or selenium or tellurium base alloy containing metal 53
420/580 Containing over 50 per cent metal but no base metal 272
420/590 Processes 415
420/591 Miscellaneous 12
420/8 Ferrous (i.e., iron base) 105
420/900 Hydrogen storage 467
420/901 Superconductive 78
420/902 Superplastic 80
420/903 Semiconductive 40


Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
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