Issued Patents 1997
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674432 | Photochromic naphthopyran compounds | David B. Knowles | 1997-10-07 |
| 5658500 | Substituted naphthopyrans | Anil Kumar, David B. Knowles | 1997-08-19 |
| 5658501 | Substituted naphthopyrans | Anil Kumar, David B. Knowles | 1997-08-19 |
| 5651923 | Substituted naphthopyrans | Anil Kumar, David B. Knowles | 1997-07-29 |
| 5650098 | Substituted naphthopyrans | Anil Kumar, David B. Knowles | 1997-07-22 |
| 5645767 | Photochromic indeno-fused naphthopyrans | — | 1997-07-08 |
| 5637262 | Photochromic substituted naphthopyran compounds | Anil Kumar | 1997-06-10 |