Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6790585 | Method for developing a high contrast photographic material containing a polyhydrazide nucleating agent | Siu C. Tsoi, John D. Goddard, Llewellyn J. Leyshon | 2004-09-14 |
| 6673528 | Ascorbic acid developing compositions containing sugar and methods of use | Shirleyanne E. Haye, Janet M. Huston | 2004-01-06 |
| 6555008 | Method to extract silver from a photographic developer | Olivier Poncelet, Danielle M. Wettling | 2003-04-29 |
| 6489090 | Stabilized ascorbic acid developing compositions and methods of use | Shirleyanne E. Haye, Janet M. Huston, Hugh G. McGuckin | 2002-12-03 |
| 6444414 | Ascorbic acid developing compositions stabilized with sulfo compound and methods of use | Shirleyanne E. Haye, Janet M. Huston, John S. Badger | 2002-09-03 |
| 6326135 | Product for industrial radiography | Gerard M. Droin | 2001-12-04 |
| 6242143 | Method and device for the processing of silver halide photographic materials | Claude G. Goumont | 2001-06-05 |
| 6228237 | Automatic measuring device for the concentration of a developing agent | Claude G. Goumont, Gerard R. Sirand-Rey | 2001-05-08 |
| 6083673 | Organic/inorganic developer composition | Siu C. Tsoi | 2000-07-04 |
| 5942379 | 3-pyrazolidone compounds and photographic developer solutions containing same | Siu C. Tsoi | 1999-08-24 |
| 5869223 | Method for replenishing an ascorbic acid developer | — | 1999-02-09 |
| 5837434 | Photographic developers containing a developing agent of the ascorbic acid type and an accelerator | Siu C. Tsoi | 1998-11-17 |
| 5780212 | Photographic developing composition | Siu C. Tsoi | 1998-07-14 |
| 5686232 | Composition for developing an exposed photographic product having improved stability in air | Claude G. Goumont | 1997-11-11 |
| 5674673 | Silver halide color photographic material | John M. Higgins | 1997-10-07 |
| 5656415 | Composition for developing an exposed photographic product having improved stability in air | Claude G. Goumont | 1997-08-12 |