Colour coupling substances (G03C7/305, G03C7/388 take precedence; )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Colour-coupling substances

CPC: Colour coupling substances (G03C7/305, G03C7/388 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

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; )

CPC subdivides this area 3x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

Note: 5 CPC extensions are marked as secondary classification only.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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G03C 2007/3206 2nd only CPC only CPC only
G03C 2007/3238 2nd only CPC only CPC only
G03C 2007/325 2nd only CPC only CPC only
G03C 2007/3257 2nd only CPC only CPC only
G03C 2007/3263 2nd only CPC only CPC only
G03C 7/3212 +1 CPC CPC only CPC only
G03C 7/3225 CPC only CPC only
G03C 7/3231 CPC only CPC only
G03C 7/3244 CPC only CPC only
G03C 7/327 Macromolecular coupling substances since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G03C 7/333 Coloured coupling substances, e.g. for the correction of the coloured image since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G03C 7/34 Couplers containing phenols (G03C7/327, G03C7/333 take precedence) +3 CPC IPC+CPC Available in IPC and CPC
G03C 7/36 Couplers containing compounds with active methylene groups (G03C7/327, G03C7/333 take precedence) +3 CPC IPC+CPC Available in IPC and CPC