Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855418 | Process for production of ceophalosporins | John H. McDonald, III | 1989-08-08 |
| 4820832 | Process for preparing 3-unsubstituted cephalosporins and 1-carba(dethia)cephalosporins | John H. McDonald, III | 1989-04-11 |