Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880934 | Preparation of hydroxyalkylpiperazinones by reacting a 2,3-dihydroxy-1,4-dioxane with a hydroalkyldiamine | Duane S. Treybig | 1989-11-14 |
| 4814443 | Preparation of hydroxyalkylpiperazinones by reacting glyoxal with hydroxyalkyldiamines | Duane S. Treybig | 1989-03-21 |