Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885411 | Hydrogenation process for converting lactones to diols | Waldo De Thomas | 1989-12-05 |
| 4873336 | Process for the preparation of N-vinyl lactams | Kou-Chang Liu | 1989-10-10 |
| 4824967 | Process for the preparation of 2-pyrrolidone | Kou-Chang Liu | 1989-04-25 |
| 4797382 | Hydrogenation catalyst and process for preparing the catalyst | Waldo De Thomas | 1989-01-10 |