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PCE
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DIFF Subgroup
G03C 7/392

Additives (G03C7/305 - G03C7/32 take precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Additives

CPC: Additives (G03C7/305 - G03C7/32 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 > Additives

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 > Additives (G03C7/305 - G03C7/32 take precedence)

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

3 codes are CPC-only extensions.

IPC defines codes here since 1990.

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