Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851546 | Preparation of pyrrolidones by catalytic hydrogenation of maleimides | Thomas G. Attig | 1989-07-25 |
| 4827001 | Preparation of .gamma.-butyrolactone and 1,4-butanediol by catalytic hydrogenation of maleic acid | Thomas G. Attig | 1989-05-02 |