Top IPC subclasses
|
1
|
C02F
|
35
|
Treatment of water, waste water, sewage, or sludge
|
|
2
|
A01N
|
13
|
Preservation of bodies of humans or animals or plants or parts thereof; biocides, e.g. as disinfectants, as pesticides or as herbicides; pest repellants or attractants; plant growth regulators
|
|
3
|
A01P
|
5
|
Biocidal, pest repellant, pest attractant or plant growth regulatory activity of chemical compounds or preparations
|
|
4
|
B01D
|
4
|
Separation
|
|
5
|
B09B
|
4
|
disposal of solid waste
|
|
6
|
C01C
|
3
|
ammoniacyanogencompounds thereof
|
|
7
|
B01J
|
3
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
|
8
|
G01M
|
3
|
testing static or dynamic balance of machines or structurestesting structures or apparatus not other
|
|
9
|
C07C
|
2
|
Acyclic or carbocyclic compounds
|
|
10
|
C08L
|
2
|
Compositions of macromolecular compounds
|
|
11
|
C01G
|
2
|
Compounds containing metals not covered by subclasses C01D or C01F
|
|
12
|
C12F
|
2
|
recovery of by-products of fermented solutionsdenaturing of, or denatured, alcohol
|
|
13
|
C05F
|
2
|
organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
|
|
14
|
G01N
|
2
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
15
|
C23F
|
2
|
non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
16
|
C09C
|
2
|
treatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling
|
|
17
|
A62D
|
2
|
chemical means for extinguishing firesprocesses for making harmful chemical substances harmless, or
|
|
18
|
A01G
|
2
|
Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
|
|
19
|
C07D
|
1
|
Heterocyclic compounds
|
|
20
|
F17D
|
1
|
pipe-line systemspipe-lines
|