Top IPC subclasses
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1
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C23F
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83
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non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
2
|
C07C
|
24
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Acyclic or carbocyclic compounds
|
|
3
|
C07F
|
9
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acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
|
4
|
C23C
|
7
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Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
|
|
5
|
B23H
|
5
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Working of metal by the action of a high concentration of electric current on a workpiece using an electrode which takes the place of a tool; such working combined with other forms of working of metal
|
|
6
|
C01B
|
4
|
non-metallic elementscompounds thereof
|
|
7
|
C25F
|
2
|
processes for the electrolytic removal of materials from objectsapparatus therefor
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|
8
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B23K
|
2
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soldering or unsolderingweldingcladding or plating by soldering or weldingcutting by applying heat l
|
|
9
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C07D
|
1
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Heterocyclic compounds
|
|
10
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C08H
|
1
|
derivatives of natural macromolecular compounds
|
|
11
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C01G
|
1
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Compounds containing metals not covered by subclasses C01D or C01F
|
|
12
|
C21D
|
1
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modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or n
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