Issued Patents All Time
Showing 176–185 of 185 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5637262 | Photochromic substituted naphthopyran compounds | Barry Van Gemert | 1997-06-10 |
| 5578252 | Photochromic substituted naphthopyran compounds | Barry Van Gemert | 1996-11-26 |
| 5573712 | Substituted naphthopyrans | Barry Van Gemert, David B. Knowles | 1996-11-12 |
| 5552091 | Benzopyran compounds | — | 1996-09-03 |
| 5466398 | Photochromic substituted naphthopyran compounds | Barry Van Gemert | 1995-11-14 |
| 5458814 | Substituted naphthopyrans | Barry Van Gemert, David B. Knowles | 1995-10-17 |
| 5429774 | Benzopyran compounds | — | 1995-07-04 |
| 5411679 | Benzopyrans | — | 1995-05-02 |
| 5281260 | High-strength tungsten carbide material for use in earth-boring bits | Larry P. Pelty | 1994-01-25 |
| 4988824 | Process for the preparation of 23-(C1-C6 alkyloxime)-LL-F28249 compounds | Donald R. Maulding | 1991-01-29 |