Malcolm D. Tirel

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Alderley Edge, GB

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Patents Grantslast 30 patents

Information Patent Grant
Developing agents
- Patent number 4,917,992
- Issue date Apr 17, 1990
- Ciba-Geigy AG
- Malcolm D. Tirel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photographic developing agents containing stable, soluble, pyrazoli...
- Patent number 4,753,869
- Issue date Jun 28, 1988
- Ciba-Geigy AG
- William E. Long
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
3-pyrazolidinone salts
- Patent number 4,732,981
- Issue date Mar 22, 1988
- Ciba-Geigy AG
- Malcolm D. Tirel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Pyrazolidinone salts as developing agents
- Patent number 4,687,846
- Issue date Aug 18, 1987
- Ciba-Geigy AG
- Malcolm D. Tirel
- C07 - ORGANIC CHEMISTRY