Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6005122 | Preparation of .alpha.-tocopherol or .alpha.-tocopheryl acetate by reacting trimethylhydroquinone and phytol or isophytol, with recycling of the zinc halide condensation catalyst | Kai-Uwe Baldenius, Wulf Kaiser, Bernhard Bockstiegel, Harald Laas, Peter D. Schmitt +1 more | 1999-12-21 |
| 5773635 | Preparation of polyenecarbonyl compounds having a high content of the all-E isomer, and of their acetals or ketals | Walter Dobler, Wolfgang Krause, Joachim Paust, Otto Worz, Udo Rheude +8 more | 1998-06-30 |
| 5382732 | 2,5-bis(1,1-dialkoxy-2-propyl)-2,5-dihydrofurans, the preparation thereof and the use thereof for the preparation of carotenoids | Juergen Frank, Udo Rheude, Joachim Paust, Eckhard Hickmann | 1995-01-17 |
| 5300658 | 2,5-bis(1,1-dialkoxy-2-propyl)-2,5-dihydrofurans, the preparation thereof and the use thereof for the preparation of carotenoids | Juergen Frank, Udo Rheude, Joachim Paust, Eckhard Hickmann | 1994-04-05 |
| 4843171 | 1,1-dialkoxy-2-methyl-4,4-diacyloxy-2-butenes | Rolf Fischer | 1989-06-27 |
| 4804786 | Preparation of 4-monoacetals of 2-methylbut-2-ene-1,4-dial | Rolf Fischer | 1989-02-14 |
| 4435427 | Stable injectable .beta.-carotene micellar solutions and their preparation | Peter P. Hoppe, Joachim Schneider, Hubert Tiefenbacher | 1984-03-06 |
| 4206153 | Treatment of methanolic-aqueous residues from syntheses employing triphenylphosphonium salts | Paul Grafen, Hans-Ulrich Scholz | 1980-06-03 |
| 4191692 | Manufacture of tocopherol | Paul Grafen, Henning Kroesche, Joachim Paust, Sigberg Pfohl | 1980-03-04 |
| 4182731 | Preparation of aqueous solutions or fine aqueous dispersions of polyenyltriarylphosphonium salts | Paul Grafen, Hans-Ulrich Scholz, Hans Grassner, Werner Reif | 1980-01-08 |