Top IPC subclasses
|
1
|
C02F
|
9
|
Treatment of water, waste water, sewage, or sludge
|
|
2
|
A61K
|
5
|
Preparations for medical, dental, or toilet purposes
|
|
3
|
A61P
|
3
|
Specific therapeutic activity of chemical compounds or medicinal preparations
|
|
4
|
B09B
|
2
|
disposal of solid waste
|
|
5
|
C07B
|
2
|
General methods of organic chemistry; apparatus therefor
|
|
6
|
C05F
|
2
|
organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
|
|
7
|
B01J
|
2
|
Chemical or physical processes, e.g. catalysis, colloid chemistry; their relevant apparatus
|
|
8
|
C08B
|
1
|
polysaccharidesderivatives thereof
|
|
9
|
G01N
|
1
|
Investigating or analysing materials by determining their chemical or physical properties
|