Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H719 | Preparation of spheroidal 3-nitro-1,2,4-triazol-5-one by crystallization | Robert E. Farncomb | 1989-12-05 |
| H581 | Mineral spirits purification process | Dennis R. Knudsen | 1989-02-07 |