Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871848 | Compositions prepared from hydrocarbyl substituted nitrogen-containing aromatic heterocyclic compounds, an aldehyde and/or ketone and an amine | Duane S. Treybig | 1989-10-03 |
| 4837323 | Corrosion inhibitors | Duane S. Treybig, Terry W. Glass | 1989-06-06 |