Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917992 | Developing agents | William E. Long | 1990-04-17 |
| 4753869 | Photographic developing agents containing stable, soluble, pyrazolidinones | William E. Long, Monica H. Gent, Terence C. Webb | 1988-06-28 |
| 4732981 | 3-pyrazolidinone salts | William E. Long | 1988-03-22 |
| 4687846 | Pyrazolidinone salts as developing agents | William E. Long | 1987-08-18 |