Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831166 | Preparation of alpha-substituted upsilon-butyrolactones | Heinz Eckhardt, Walter Gramlich, Walter F. Best | 1989-05-16 |
| 4806670 | Preparation of .alpha.-substituted .beta.-dicarbonyl and .beta.-cyanocarbonyl compounds | Walter Gramlich, Gerd Heilen | 1989-02-21 |