Top IPC subclasses
1
|
C07C
|
1
|
Acyclic or carbocyclic compounds
|
2
|
C01B
|
1
|
non-metallic elementscompounds thereof
|
3
|
B82B
|
1
|
nano-structuresmanufacture or treatment thereof
|
4
|
C22B
|
1
|
production or refining of metalspretreatment of raw materials
|
5
|
C30B
|
1
|
single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
|