Top IPC subclasses
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1
|
C02F
|
6
|
Treatment of water, waste water, sewage, or sludge
|
|
2
|
C25B
|
5
|
Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
|
3
|
C12P
|
3
|
fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or t
|
|
4
|
B01D
|
2
|
Separation
|
|
5
|
C12M
|
2
|
apparatus for enzymology or microbiology
|
|
6
|
C01G
|
2
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
7
|
C01B
|
1
|
non-metallic elementscompounds thereof
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