Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G03C 7/36

Couplers containing compounds with active methylene groups (G03C7/327, G03C7/333 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Couplers containing compounds with active methylene groups

CPC: Couplers containing compounds with active methylene groups (G03C7/327, G03C7/333 take precedence)

Full Title

Full titles differ between systems:

IPC:

Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes > Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials > Colour-coupling substances > Couplers containing compounds with active methylene groups

CPC:

Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes (diffusion transfer processes G03C8/00) > Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials > Colour coupling substances (G03C7/305, G03C7/388 take precedence; ) > Couplers containing compounds with active methylene groups (G03C7/327, G03C7/333 take precedence)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

Child Classifications

Navigate with arrow keys, Enter to open