Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888100 | Photochemical conversion of cephalosporins, 1-carba(1-dethia)cephalosporins and 1-oxa(1-dethia)cephalosporins | Larry W. Hertel, Robert Theodore Vasileff | 1989-12-19 |
| 4885362 | Azetidinone intermediates for 1-carba(dethia)caphalosporins | William C. Vladuchick | 1989-12-05 |