Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820452 | Bechamp reduction of DNS to DAS using H.sub.2 SO.sub.4 and trace of HOAc | Glenn William Brown, JR. | 1989-04-11 |
| 4808342 | Production of sulfonated amines | Milo C. Pass | 1989-02-28 |