Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842776 | Styrylaryloxy ether sulfonates, a process for their preparation and their use in the recovery of crude oil | Manfred Schmidt, Walter Rupp, Eva M. Kohn | 1989-06-27 |
| 4826528 | Herbicidally effective sulfonylureas | Rudolf Mengel, W. Pfleiderer, Gerbert Linden | 1989-05-02 |