Patrick D. P. Thomas

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Chelmsford, GB

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Patents Grantslast 30 patents

Information Patent Grant
Hydroquinone derivatives and their use in photographic materials
- Patent number 4,480,104
- Issue date Oct 30, 1984
- Ciba-Geigy AG
- Stephen R. Postle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Hydroquinone derivatives and their use in photographic materials
- Patent number 4,443,537
- Issue date Apr 17, 1984
- Ciba-Geigy AG
- Stephen R. Postle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Hydroquinone derivatives and their use in photographic materials
- Patent number 4,426,444
- Issue date Jan 17, 1984
- Ciba-Geigy AG
- Stephen R. Postle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Hydroquinone derivatives and their use in photographic materials
- Patent number 4,417,072
- Issue date Nov 22, 1983
- Ciba-Geigy AG
- Stephen R. Postle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Hydroquinone derivatives of pyridinecarboxylic acids
- Patent number 4,410,702
- Issue date Oct 18, 1983
- Ciba-Geigy AG
- Stephen R. Postle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the production of photographic images and photographic...
- Patent number 4,353,974
- Issue date Oct 12, 1982
- Ciba-Geigy AG
- Terence C. Webb
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY