Top IPC subclasses
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1
|
C02F
|
91
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Treatment of water, waste water, sewage, or sludge
|
|
2
|
C07C
|
28
|
Acyclic or carbocyclic compounds
|
|
3
|
B01D
|
23
|
Separation
|
|
4
|
C25B
|
20
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Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
|
|
5
|
C12P
|
13
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fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or t
|
|
6
|
C01C
|
11
|
ammoniacyanogencompounds thereof
|
|
7
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C01B
|
11
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non-metallic elementscompounds thereof
|
|
8
|
A62D
|
11
|
chemical means for extinguishing firesprocesses for making harmful chemical substances harmless, or
|
|
9
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C12M
|
10
|
apparatus for enzymology or microbiology
|
|
10
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C12F
|
10
|
recovery of by-products of fermented solutionsdenaturing of, or denatured, alcohol
|
|
11
|
B01J
|
10
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Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
|
12
|
C01G
|
8
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
13
|
B27K
|
8
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processes, apparatus or selection of substances for impregnating, staining, dyeing, bleaching of woo
|
|
14
|
B09B
|
7
|
disposal of solid waste
|
|
15
|
B01F
|
5
|
mixing, e.g. dissolving, emulsifying, dispersing
|
|
16
|
C05F
|
5
|
organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
|
|
17
|
C10L
|
5
|
fuels not otherwise provided fornatural gassynthetic natural gas obtained by processes not covered b
|
|
18
|
C11D
|
4
|
detergent compositionsuse of single substances as detergentssoap or soap-makingresin soapsrecovery o
|
|
19
|
C11C
|
4
|
fatty acids from fats, oils or waxescandlesfats, oils or fatty acids by chemical modification of fat
|
|
20
|
C12H
|
3
|
pasteurisation, sterilisation, preservation, purification, clarification, ageing of alcoholic bevera
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