Issued Patents All Time
Showing 26–50 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017719 | Esters of arylbisperfluoroalkylcarbinols, and a process for the preparation of these compounds | Alfred Kruse, Ingo Ruppert, deceased | 1991-05-21 |
| 5004797 | Partly fluorinated carboxylic acids and derivatives thereof, processes for their preparation and their use | Freimund Rohrscheid, Jurgen Lau | 1991-04-02 |
| 4992593 | Partially fluorinated diphenyl ethers, processes for their preparation and their use | — | 1991-02-12 |
| 4978790 | 4,4'-bis[2-(4-hydroxy-amino-phenyl)hexafluoroisopropyl]-diphenylethers and their use | Jurgen Lau | 1990-12-18 |
| 4973749 | Process for the dimerization of hexafluoropropene oxide | Manfred Finke | 1990-11-27 |
| 4968845 | Process for the preparation of halogen-containing aromatic compounds | Joachim Hackenbruch, Theodor Papenfuhs, Klaus Warning | 1990-11-06 |
| 4968848 | Process of the prparation of perfluoroalkyl compounds, and pentafluoroethyltrimethylsilane | Alfred Kruse, Axel Schumann | 1990-11-06 |
| 4966987 | Fluoro-containing 1-arylalkoxytris(dialkylamino)phosphonium salt, a process for their preparation and their use | Alfred Kruse, Axel Schumann, Ingo Ruppert, deceased | 1990-10-30 |
| 4924014 | Process for the preparation of halogen-containing aromatic compounds | Andreas Fuss | 1990-05-08 |
| 4922019 | Derivatives of 2,2-bis-(3-aminophenyl)hexafluoropropane and process for the preparation of 2,2-bis-(3,4-diaminophenyl)hexafluoropropane | Jurgen Lau | 1990-05-01 |
| 4874557 | Process for the preparation of perfluorinated carbonyl fluorides | Alfred Kruse, Werner Schwertfeger | 1989-10-17 |
| 4835318 | Process for the preparation of aryl perfluoroalkyl ketones | Alfred Kruse, Klaus Schlich, Ingo Ruppert, deceased | 1989-05-30 |
| 4778568 | Process for separating isomer mixtures of 1,3- and 1,4- bis-(2-hydroxyhexafluoro-prop-2-yl)-benzene | Klaus Schneider | 1988-10-18 |
| 4774370 | Process for preparing 2,2-bis-(3-nitrophenyl)-hexafluoropropane, and 2,2-bis-(4-carboxy-3-nitrophenyl)-hexafluoropropane occurring as an intermediate | Klaus Schneider | 1988-09-27 |
| 4727142 | Process for the preparation of imidates | Andreas Fuss | 1988-02-23 |
| 4623491 | Process for the preparation of halogenated aliphatic carboxylic acid fluorides | Werner Schwertfeger | 1986-11-18 |
| 4603017 | Fluorosulfonate containing polyfluorocarbonyl compounds | Hans Millauer, Werner Schwertfeger | 1986-07-29 |
| 4603111 | Preparation of biocatalysts in bead form | Reinhold Keller | 1986-07-29 |
| 4578369 | Process for the regeneration of fluorination catalysts | Thomas Muller | 1986-03-25 |
| 4547483 | Catalysts for fluorination and/or dismutation reactions on halogenated hydrocarbons, and a process for their preparation | Thomas Muller | 1985-10-15 |
| 4532366 | Perfluorinated vinyl ethers containing a secondary hydrogen atom, polymers formed therefrom and a process for the preparation of the monomers | Werner Schwertfeger | 1985-07-30 |
| 4524031 | Fluorosulfatoperfluorocarbonyl compounds | Hans Millauer, Werner Schwertfeger | 1985-06-18 |
| 4469641 | Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) | Hans Millauer, Werner Schwertfeger | 1984-09-04 |
| 4454072 | Process for the preparation of .omega.-fluorosulfatoperfluoroalkanoic acid derivatives | Werner Schwertfeger | 1984-06-12 |
| 4400546 | Process for the preparation of hexafluoroacetone and direct use of the solution obtained by the process | Peter-Paul Rammelt | 1983-08-23 |