Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5358835 | Photographic elements containing new yellow-dye-forming tris couplers | Ping-Wah Tang, Stanley W. Cowan | 1994-10-25 |
| 5358837 | Photographic elements containing new magenta-dye-forming bis couplers | Ping-Wah Tang, Terrence C. Mungal, Stanley W. Cowan | 1994-10-25 |
| 5358838 | Photographic elements containing new yellow-dye-forming tris couplers | Ping-Wah Tang, Stanley W. Cowan | 1994-10-25 |
| 5340708 | Photographic elements containing new dye-forming tris couplers | Ping-Wah Tang, Stanley W. Cowan | 1994-08-23 |
| 5262284 | Arylidene pyrazolone coupler | Danny R. Thompson, Stephen P. Singer | 1993-11-16 |
| 5237030 | Polymeric couplers prepared in the presence of a coupler solvent | Ping-Wah Tang, Stanley W. Cowan | 1993-08-17 |
| 5141844 | Polymeric dye-forming couplers | — | 1992-08-25 |
| 5118599 | Yellow couplers for photographic elements and processes | Danny R. Thompson, Frederick Rick Green | 1992-06-02 |
| 5091291 | Alkyl substituted photographic couplers and photographic elements and processes employing same | Danny R. Thompson | 1992-02-25 |
| 5055385 | Photographic elements containing release compounds-II | Wojciech K. Slusarek, John M. Buchanan | 1991-10-08 |
| 5043469 | Process for preparing 5-substituted aminophenols | Danny R. Thompson | 1991-08-27 |
| 5034311 | Photographic elements containing release compounds I | Wojciech K. Slusarek, John M. Buchanan, David T. Southby | 1991-07-23 |
| 4992359 | Polymeric couplers | Ping-Wah Tang, Stanley W. Cowan | 1991-02-12 |
| 4990436 | Cyan dye-forming couplers and photographic recording materials containing same | — | 1991-02-05 |
| 4940812 | 5-substituted aminophenols | Danny R. Thompson | 1990-07-10 |
| 4914005 | Photographic element containing a cyan dye forming coupler | Ping-Wah Tang, Stanley W. Cowan | 1990-04-03 |
| 4804620 | Photographic material containing a novel polymeric dye-forming coupler | Ping-Wah Tang, Stanley W. Cowan, Harold I. Machonkin, Tien-Teh Chen | 1989-02-14 |
| 4777120 | Photographic element and process comprising a masking coupler | — | 1988-10-11 |
| 4612278 | Photographic materials and process comprising polymeric couplers with alkoxyalkylacrylate comonomers | Ping-Wah Tang | 1986-09-16 |
| 4552834 | Enhanced bleaching of photographic elements containing silver halide and adsorbed dye | Gary M. Einhaus | 1985-11-12 |
| 4435495 | Release of photographic reagents with 3-pyrazolidone developing agents | — | 1984-03-06 |
| T103402 | Aryloxy substituted photographic couplers and photographic elements and processes employing same | — | 1983-09-06 |
| 4401752 | Aryloxy substituted photographic couplers and photographic elements and processes employing same | — | 1983-08-30 |
| 4333999 | Cyan dye-forming couplers | — | 1982-06-08 |
| T101601 | Cyan dye-forming couplers | — | 1982-03-02 |