Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5488162 | Process for preparing o-alkylhydroxylamine salts without the isolation of intermediates | — | 1996-01-30 |
| 5382682 | Nitroanilides and their preparation | Lee H. Latimer | 1995-01-17 |
| 5332826 | Process for preparing aminoacetonitriles in one vessel | — | 1994-07-26 |
| 5332825 | Single vessel synthesis of aminoacetonitriles | — | 1994-07-26 |
| 5220041 | Sulfonate ester | — | 1993-06-15 |
| 5212318 | Preparation of omega-substituted alkanamide | — | 1993-05-18 |
| 5021333 | Color photographic element, compounds and process | Llewellyn J. Leyshon, Paul A. Burns | 1991-06-04 |
| 4994576 | Method for reducing aromatic nitro groups | Robert Gourley | 1991-02-19 |
| 4876182 | Photographic elements containing pyrazolone color couplers | — | 1989-10-24 |
| 4853319 | Photographic silver halide element and process | Sundaram Krishnamurthy, Brian H. Johnston, Kenneth N. Kilminster, David C. Vogel | 1989-08-01 |
| 4824771 | Photographic acetanilide couplers with novel ballast group and photographic elements containing them | John D. Goddard | 1989-04-25 |
| 4777121 | Substituted pyrazolo[3, 2-c]-s-triazole photographic couplers and photographic materials and processes employing them | Llewellyn J. Leyshon | 1988-10-11 |
| 4758501 | Photographic acetanilide couplers and photographic elements containing them | Siu C. Tsoi | 1988-07-19 |