Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357472 | Process for the production of thionaphthene from thionaphthene sulfonic acid | Georg Grigoleit, Helmut Kohler, Gerd Collin | 1982-11-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357472 | Process for the production of thionaphthene from thionaphthene sulfonic acid | Georg Grigoleit, Helmut Kohler, Gerd Collin | 1982-11-02 |