Lenoir; John
Patent Applications and Registrations
Patent applications and USPTO patent grants for Lenoir; John.The latest application filed is for "process for the prevention of darkening and the formation of a sediment in photographic developer solutions".
- Lenoir; John - Marly CH
- Lenoir; John - Marly-le-Petit CH
| Patent | Date |
|---|---|
| Process for the prevention of darkening and the formation of a sediment in photographic developer solutions Grant 4,254,215 - Kramp , et al. March 3, 1 | 1981-03-03 |
| Quinoxalines and their use in photographic processes Grant 4,145,217 - Jan , et al. March 20, 1 | 1979-03-20 |
| Photographic material containing sulphonic acid group containing disazo dyestuffs Grant 4,118,232 - Piller , et al. October 3, 1 | 1978-10-03 |
| Sulfonic-acid-group containing disazo dyestuffs Grant 4,051,123 - Piller , et al. September 27, 1 | 1977-09-27 |
| Photographic Light-sensitive Material Grant 3,634,091 - Loeffel , et al. January 11, 1 | 1972-01-11 |
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