Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7153641 | Photographic element containing improved pyrazolotriazole coupler | Robert F. Romanet, Susan M. Fischer | 2006-12-26 |
| 6900006 | Photographic elements containing a de-aggregating compound, dye-forming coupler and stabilizer | Danuta Gibson, David Clarke, Christopher J. Winscom | 2005-05-31 |
| 6190853 | Photographic elements containing novel yellow couplers | — | 2001-02-20 |
| 6132943 | Color photographic elements containing yellow-colored magenta dye-forming masking couplers | Janet N. Younathan, Krishnan Chari | 2000-10-17 |
| 6030760 | Photographic element containing specific magenta coupler and anti-fading agent | Leslie Shuttleworth, Stanley W. Cowan | 2000-02-29 |
| 6015657 | Photographic elements containing 2-equivalent pyrazolone couplers and process for their use | Sundram Krishnamurthy, David S. Bailey, John L. Pawlak | 2000-01-18 |
| 6010839 | Color photographic elements containing yellow-colored magenta dye-forming masking couplers | Krishnan Chari, Allan F. Sowinski | 2000-01-04 |
| 6010837 | Silver halide photographic element comprising image dye-forming couplers | Bernard A. Clark, Jane S. Boff, Christina M. Watts, Stephen P. Singer, Paul L. Stanley | 2000-01-04 |
| 5919969 | Synthesis of yellow couplers | — | 1999-07-06 |
| 5876912 | Pyrazolo 1,5 a benzimidazole photographic color couplers | Andrew Gibson, Paul L. Stanley, Hugh M. Williamson | 1999-03-02 |
| 5849469 | Process for forming an image using novel magneta couplers for color photography | — | 1998-12-15 |
| 5776669 | Phenol substituted pyrazolo 1, 5-a benzimidazole couplers | Andrew Gibson, Hugh M. Williamson | 1998-07-07 |
| 5210209 | Pyrazolo(1,5-a)benzimidazole couplers | — | 1993-05-11 |
| 5190848 | Photographic .beta.-ketoamide and photographic elements containing them | — | 1993-03-02 |
| 5143821 | Color photographic material comprising a 2-alkoxy pyrazolo[1,5-a]benzimidazole color coupler | Andrew Gibson | 1992-09-01 |
| 5001262 | Method for synthesizing an aromatic hydrazine compound | — | 1991-03-19 |
| 4900657 | Novel pyrazolone photographic color couplers and photographic elements containing them | Paul L. Stanley | 1990-02-13 |
| 4548888 | Photographic products employing novel nondiffusible hydrazone dye-releasing compounds | — | 1985-10-22 |
| 4481268 | Method of forming a photographic dye image | Joseph Bailey, David Clarke, Peter D. Marsden, Jasbir Sidhu | 1984-11-06 |