Patent Classification Explorer PCE

DIFF Subgroup

C01B 17/16

Hydrogen sulfides

Introduced: September 1968

Full Title

Sulfur; Compounds thereof > Hydrogen sulfides

CPC subdivides this area 6x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

Child Classifications

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C01B 17/161 +1 CPC CPC only CPC only
C01B 17/164 CPC only CPC only
C01B 17/165 CPC only CPC only
C01B 17/167 CPC only CPC only
C01B 17/168 CPC only CPC only
C01B 17/18 Hydrogen polysulfides IPC+CPC Available in IPC and CPC