Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5677118 | Photographic element containing a recrystallizable 5-pyrazolone photographic coupler | Paul P. Spara, Sundaram Krishnamurthy, Stanley W. Cowan | 1997-10-14 |
| 4599423 | Preparation of 5-(hydroxy- and/or aminophenyl-6-lower-alkyl)-2(1H)-pyridinones | George Y. Lesher, Chester J. Opalka, Jr., Donald F. Page | 1986-07-08 |
| 4465686 | 5-(Hydroxy- and/or amino-phenyl)-6-(lower-alkyl)-2-(1H)-pyridinones, their cardiotonic use and preparation | George Y. Lesher, Chester J. Opalka, Jr., Donald F. Page | 1984-08-14 |