Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5319148 | Preparation of pyrocatechol monoethers and pyrocatechols | Michael Karcher, Horst Zimmermann | 1994-06-07 |
| 5296614 | Preparation of phthalides | Thomas Ruehl, Horst Zimmermann | 1994-03-22 |