Issued Patents All Time
Showing 51–63 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5573712 | Substituted naphthopyrans | Anil Kumar, Barry Van Gemert | 1996-11-12 |
| 5565147 | Photochromic naphthopyran compounds | Barry Van Gemert | 1996-10-15 |
| 5552090 | Photochromic naphthopyran compounds | Barry Van Gemert | 1996-09-03 |
| 5514817 | Substituted phenanthropyrans | — | 1996-05-07 |
| 5464567 | Photochromic tetraphenyl naphthodipyrans | Barry Van Gemert | 1995-11-07 |
| 5458814 | Substituted naphthopyrans | Anil Kumar, Barry Van Gemert | 1995-10-17 |
| 5458815 | Photochromic naphthopyran compounds | — | 1995-10-17 |
| 5451344 | Photochromic naphthopyran compounds | Barry Van Gemert | 1995-09-19 |
| 5395567 | Photochromic spironaphthopyran compounds | Barry Van Gemert | 1995-03-07 |
| 5384077 | Photochromic naphthopyran compounds | — | 1995-01-24 |
| 5369158 | Photochromic naphthopyrans | — | 1994-11-29 |
| 5238981 | Photochromic naphthopyrans | — | 1993-08-24 |
| 4986934 | Photochromic compound and articles containing the same | Patricia L. Kwiatkowski | 1991-01-22 |