Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5637764 | Process for the preparation of brominated or chlorinated aromatic carboxylic acids | Georg Grotsch | 1997-06-10 |
| 5523472 | Process for the preparation of 5-fluoroanthranilic acid | Jochen Rapp, Theodor Papenfuhs | 1996-06-04 |
| 5300717 | Process for the preparation of dixylylpropane | — | 1994-04-05 |
| 5288908 | Process for the preparation of fluorine containing monomers | Jurgen Lau, Gunter Siegemund | 1994-02-22 |
| 5274126 | Partially fluorinated tetracarboxylic acid and the dianhydride thereof, a process for their preparation and their use | Wolfgang Appel, Gunter Siegemund | 1993-12-28 |
| 5202469 | Partially fluorinated dicarboxylic acid and the acid chloride thereof, and a process for their preparation | Wolfgang Appel, Gunter Siegemund | 1993-04-13 |
| 5175351 | Process for the preparation of alkanesulfonylbenzoic acids | — | 1992-12-29 |
| 5153334 | Partially fluorinated tetracarboxylic acid and the dianhydride thereof | Wolfgang Appel, Gunter Siegemund | 1992-10-06 |
| 5110983 | Hexafluoroisopropyl-containing monomers, process for their preparation and their use | Jurgen Lau, Gunter Siegemund | 1992-05-05 |
| 5004797 | Partly fluorinated carboxylic acids and derivatives thereof, processes for their preparation and their use | Gunter Siegemund, Jurgen Lau | 1991-04-02 |
| 4987238 | Process for the preparation of high-purity 5,5'-[2,2,2-trifluoro-1-(trifluoromethyl)-ethylidene]bis-1,3-isobenzofur andione | — | 1991-01-22 |
| 4772754 | Process for the isolation of p-hydroxybenzaldehyde | — | 1988-09-20 |
| 4748278 | Process for the isolation of p-hydroxybenzaldehyde | — | 1988-05-31 |