Top IPC subclasses
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1
|
C23F
|
76
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non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
2
|
C07C
|
25
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Acyclic or carbocyclic compounds
|
|
3
|
C23C
|
12
|
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
|
|
4
|
C07F
|
10
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acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
|
5
|
B23H
|
10
|
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
|
G01N
|
4
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
7
|
C22C
|
2
|
alloys
|
|
8
|
C01B
|
2
|
non-metallic elementscompounds thereof
|
|
9
|
C07D
|
1
|
Heterocyclic compounds
|
|
10
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C08H
|
1
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derivatives of natural macromolecular compounds
|
|
11
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
12
|
C25F
|
1
|
processes for the electrolytic removal of materials from objectsapparatus therefor
|
|
13
|
C21D
|
1
|
modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or n
|
|
14
|
C01F
|
1
|
compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium
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