Issued Patents All Time
Showing 25 most recent of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7109362 | Process for the preparation of lipoic acid and dihydrolipoic acid | Martin Klatt, Markus Niebel | 2006-09-19 |
| 6906210 | Method for producing lipoic acid and dihydrolipoic acid | Martin Klatt, Markus Niebel | 2005-06-14 |
| 6740774 | Preparation of N-acylamino acid esters and N-acylamino acetals | Hansgeorg Ernst, Reinhard Kaczmarek, Hagen Jaedicke | 2004-05-25 |
| 6673971 | Preparation of 1,1,4,4-tetramethoxy-2-butene | Christoph Wegner, Hansgeorg Ernst | 2004-01-06 |
| 6603045 | Preparation of phosphonium salts | Christoph Wegner, Michael Sasha John | 2003-08-05 |
| 6441024 | Crystal modification of lipoic acid | Martin Klatt, Markus Niebel, Jens Rieger | 2002-08-27 |
| 6433226 | Preparation of phosphonium salts | Christoph Wegner, Michael Sasha John | 2002-08-13 |
| 6407291 | Preparation of 1,1,4,4-tetramethoxy-2-butene | Christoph Wegner, Hansgeorg Ernst | 2002-06-18 |
| 6348593 | Process for preparing folic acid | Jörg Botzem, Hagen Jaedicke, Michael Sasha John | 2002-02-19 |
| 6271396 | Use of organosulfur compounds for effecting a bathocromic shift in the UV/vis absorption bands of carotenoids | Helmut Auweter, Heribert Bohn, Dieter Horn, Klaus Kramer, Horst Weiss | 2001-08-07 |
| 6187959 | Preparation of phosphonium salts | Christoph Wegner, Michael Sasha John | 2001-02-13 |
| 6111125 | Preparation of (1R,4S)-4-hydroxy-1,2,2-trimethylcyclopentyl methyl ketone and derivatives and stereoisomers of this compound | Michael Sasha John, Udo Rheude, Joachim Meyer | 2000-08-29 |
| 6103940 | Preparation of zeaxanthin, intermediates for this preparation, and the preparation thereof | Wolfgang Kriegl | 2000-08-15 |
| 5777173 | Preparation of pure trans- and cis-4-Hydroxy-2,2,6-trimethylcyclohexan-1-one from isomerc mixtures | Wolfgang Kriegl, Horst Hartmann | 1998-07-07 |
| 5773635 | Preparation of polyenecarbonyl compounds having a high content of the all-E isomer, and of their acetals or ketals | Walter Dobler, Wolfgang Krause, Otto Worz, Udo Rheude, Wolfram Burst +8 more | 1998-06-30 |
| 5717128 | Preparation of alkylesters of 0,0-dialkyl-4-phosphono-2-methyl-2-butenoic acid and alkyl esters of 4-halo-2-methyl-2-butenoic acid containing a high percentage of E isomers | Wolfgang Krause, Hansgeorg Ernst, Udo Rheude, Walter Dobler | 1998-02-10 |
| 5689022 | Preparation of .beta.-carotene products with a high 9 (Z) content | Michael Sasha John | 1997-11-18 |
| 5654444 | Preparation of 5-hydroxy-4-methyl-2(5H)-furanone | Michael Sasha John, Walter Dobler | 1997-08-05 |
| 5654488 | Preparation of astaxanthin | Wolfgang Krause, Klaus Henrich, Hansgeorg Ernst | 1997-08-05 |
| 5625099 | Preparation of astaxanthin, novel intermediates therefor and the preparation thereof | Hansgeorg Ernst, Walter Dobler, Udo Rheude | 1997-04-29 |
| 5582739 | Reduction of the phosphate content in waste water from the preparation of metal salts of ascorbic acid 2-monophosphate | Klaus Kaiser | 1996-12-10 |
| 5530143 | Preparation of (6s)-6,8-dihydroxyoctanoic esters | Friedhelm Balkenhohl | 1996-06-25 |
| 5504230 | Preparation of 9-(Z)-retinoic acid | Michael Sasha John | 1996-04-02 |
| 5489694 | Preparation of R/S-.gamma.-lipoic acid or R/S-.alpha.-lipoic acid | Peter Eckes, Wolfgang Siegel, Friedhelm Balkenhohl, Walter Dobler, Michael Hullmann | 1996-02-06 |
| 5455362 | Preparation of astaxanthin novel intermediates therefor and the preparation thereof | Hansgeorg Ernst, Walter Dobler, Udo Rheude | 1995-10-03 |