Issued Patents All Time
Showing 1–25 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197071 | Formulations for dyeing keratin fibers comprising a pyrazolotriazole coupler and oxidation base | Donald R. Diehl, Mbiya Kapiamba | 2001-03-06 |
| 6143485 | Pyrazolotriazle dye-forming photographic coupler | Ping-Wah Tang | 2000-11-07 |
| 6140031 | Photographic element containing a cyclic azole coupler and an anti-fading agent containing a combination of functionalities | Albert J. Mura | 2000-10-31 |
| 6140033 | Photographic element | Donald R. Diehl, Mbiya Kapiamba | 2000-10-31 |
| 6136522 | Photographic element containing pyrazoloazole coupler and a specific anti-fading combination | Philip T. S. Lau | 2000-10-24 |
| 6071686 | Photographic element containing pyrazoloazole coupler and a specific anti-fading combination | Albert J. Mura | 2000-06-06 |
| 6071684 | Photographic element containing specific magenta coupler | Leslie Shuttleworth, Rakesh K. Jain | 2000-06-06 |
| 6048680 | Photographic element containing pyrazoloazole coupler and a specific anti-fading combination | Franklin D. Saeva, Daniel L. Kapp, Philip T. S. Lau, Michael W. Fichtner | 2000-04-11 |
| 6040126 | Photographic yellow dye-forming couplers | Ping-Wah Tang, Barbara B. Lussier | 2000-03-21 |
| 6030760 | Photographic element containing specific magenta coupler and anti-fading agent | Leslie Shuttleworth, Michael W. Crawley | 2000-02-29 |
| 6004738 | Photographic elements containing cyan dye-forming coupler, coupler solvent and bisphenol derivative | Philip T. S. Lau, David Clarke, Llewellyn J. Leyshon | 1999-12-21 |
| 5998122 | Photographic element containing pyrazoloazole magenta coupler and a specific anti-fading agent | Paul P. Spara | 1999-12-07 |
| 5976777 | Photographic element containing magenta coupler with particular substituent | John W. Harder, Rakesh K. Jain | 1999-11-02 |
| 5965342 | Photographic elements containing specified cyan dye-forming couplers for improved heat and light stability | Philip T. S. Lau | 1999-10-12 |
| 5962198 | Photographic elements containing cyan dye-forming coupler having a particular formula | Philip T. S. Lau, Louis J. Rossi | 1999-10-05 |
| 5888716 | Photographic element containing improved coupler set | James L. Edwards, Philip T. S. Lau | 1999-03-30 |
| 5851748 | Photographic materials and process comprising a particular acylacetanilide yellow dye-forming coupler | Ping-Wah Tang, David J. Decker, Thomas A. Rosiek | 1998-12-22 |
| 5834166 | Photographic element containing a particular cyan dye-forming coupler | Philip T. S. Lau, David Hoke | 1998-11-10 |
| 5811230 | Photographic material comprising a bicyclic pyrazolo coupler | Ping-Wah Tang, Wendell Smith | 1998-09-22 |
| 5726002 | Photographic element containing a particular cyan coupler dispersed in a phenolic solvent | Philip T. S. Lau | 1998-03-10 |
| 5698386 | Photographic dye-forming coupler, emulsion layer, element, and process | Ping-Wah Tang, David J. Decker, Susan M. Fischer | 1997-12-16 |
| 5686235 | Photographic elements containing cyan dye-forming coupler having a sulfone ballast group | Philip T. S. Lau, Louis J. Rossi | 1997-11-11 |
| 5681689 | Photographic material containing acrylate or acrylamide based yellow dye-forming couplers | Philip T. S. Lau | 1997-10-28 |
| 5677118 | Photographic element containing a recrystallizable 5-pyrazolone photographic coupler | Paul P. Spara, Sundaram Krishnamurthy, Ruthann M. McGarry | 1997-10-14 |
| 5674666 | Photographic elements containing new cyan dye-forming coupler providing improved color reproduction | Philip T. S. Lau, Louis J. Rossi | 1997-10-07 |