Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017719 | Esters of arylbisperfluoroalkylcarbinols, and a process for the preparation of these compounds | Gunter Siegemund, Ingo Ruppert, deceased | 1991-05-21 |
| 4968848 | Process of the prparation of perfluoroalkyl compounds, and pentafluoroethyltrimethylsilane | Gunter Siegemund, Axel Schumann | 1990-11-06 |
| 4966987 | Fluoro-containing 1-arylalkoxytris(dialkylamino)phosphonium salt, a process for their preparation and their use | Gunter Siegemund, Axel Schumann, Ingo Ruppert, deceased | 1990-10-30 |
| 4874557 | Process for the preparation of perfluorinated carbonyl fluorides | Gunter Siegemund, Werner Schwertfeger | 1989-10-17 |
| 4835318 | Process for the preparation of aryl perfluoroalkyl ketones | Gunter Siegemund, Klaus Schlich, Ingo Ruppert, deceased | 1989-05-30 |