Inventor

TIREL MALCOLM D

GB4 patents

Patents

4 patents

US4917992AApr 17, 1990

Developing agents

CIBA GEIGY AG8 citations71

US4753869AJun 28, 1988

Photographic developing agents containing stable, soluble, pyrazolidinones

CIBA GEIGY AG9 citations68

US4687846AAug 18, 1987

Pyrazolidinone salts as developing agents

CIBA GEIGY AG1 citations60

US4732981AMar 22, 1988

3-pyrazolidinone salts

CIBA GEIGY AG0 citations49