Top IPC subclasses
1
|
B01D
|
5
|
Separation
|
2
|
C02F
|
3
|
Treatment of water, waste water, sewage, or sludge
|
3
|
C22C
|
2
|
alloys
|
4
|
B01J
|
2
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
5
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
6
|
C25D
|
1
|
processes for the electrolytic or electrophoretic production of coatingselectroformingjoining workpi
|