Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886785 | Pyrimidine derivatives, pharmaceutical compositions and method of using same | Robert W. Lambert, Joseph Armstrong Martin | 1989-12-12 |
| 4882316 | Pyrimidine derivatives | Robert W. Lambert, Joseph Armstrong Martin | 1989-11-21 |
| 4851519 | Pyrimidine derivatives | Robert W. Lambert, Joseph Armstrong Martin | 1989-07-25 |
| 4830800 | Method of producing a dense refractory silicon nitride (SI.sub.3 N.sub.4) compact with one or more crystalline intergranular phases | Sylvia M. Johnson, Timothy R. Dinger | 1989-05-16 |