Top IPC subclasses
1
|
C07D
|
2
|
Heterocyclic compounds
|
2
|
C09K
|
2
|
materials for applications not otherwise provided forapplications of materials not otherwise provide
|
3
|
C07F
|
1
|
acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|