Top IPC subclasses
|
1
|
C02F
|
24
|
Treatment of water, waste water, sewage, or sludge
|
|
2
|
C25B
|
10
|
Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
|
3
|
C01G
|
4
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
4
|
C12P
|
4
|
fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or t
|
|
5
|
C12M
|
3
|
apparatus for enzymology or microbiology
|
|
6
|
B01J
|
2
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
|
7
|
B01D
|
1
|
Separation
|
|
8
|
C01B
|
1
|
non-metallic elementscompounds thereof
|
|
9
|
C12F
|
1
|
recovery of by-products of fermented solutionsdenaturing of, or denatured, alcohol
|
|
10
|
C01D
|
1
|
compounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium
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