Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7547807 | Method for producing phosphonium salts | Laszlo Szarvas, Klemens Massonne, Kai Michael Exner, Detlev Glas | 2009-06-16 |
| 6784303 | Method for continuously acylating chromanol ester derivatives | Carsten Oost, Gerd Kaibel, Peter D. Schmitt, Jens von Erden | 2004-08-31 |
| 6554965 | Rectification column for isolating pure substances from high boiling air-and/or temperature sensitive substances | Horst Hartmann, Wolfram Burst, Wulf Kaiser, Paul Grafen, Bernhard Bockstiegel +1 more | 2003-04-29 |
| 6365758 | Preparation of tocopheral carboxylates or tocotrienyl esters by acid-catalyzed reaction with carboxylic acids | Joanna Linda von dem Bussche-Hünnefeld, Hagen Jaedicke, Guido Harms | 2002-04-02 |
| 6111117 | Process for isolation of pure substances from mixtures of high-boiling air and/or temperature-sensitive substances which require a high separation efficiency by rectification under medium vacuum, and columns suitable for this process | Horst Hartmann, Wolfram Burst, Wulf Kaiser, Paul Grafen, Bernhard Bockstiegel +1 more | 2000-08-29 |
| 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, Bernhard Schulz, Peter D. Schmitt +1 more | 1999-12-21 |
| 5950454 | Cloth or cloth-like packing which is subject to low pressure losses and has an ordered structure for use in material-exchange columns and rectification method using such packing | Wolfram Burst, Horst Hartmann, Wulf Kaiser, Paul Grafen, Bernhard Bockstiegel +1 more | 1999-09-14 |
| 5041572 | Preparation of 2,3,5-trimethyl-p-benzoquinone | Ulrich Hoercher, Barbara Jessel, Bernhard Bockstiegel, Paul Grafen | 1991-08-20 |
| 4820874 | Increasing the yield of 2.5.6-trimethylcyclohex-2-en-1-one | Peter Tavs, Horst Schauer, Lothar Arnold | 1989-04-11 |
| 4600799 | Preparation of trimethylhydroquinone | Franz J. Broecker, Peter Tavs, Wolf-Karlo Aders | 1986-07-15 |
| 4562277 | Process for the preparation of a bis-salicylidene-alkylene-diaminocobaltous ion complex | Peter Tavs, Heinz Hannebaum, Manfred Stroezel | 1985-12-31 |
| 4538009 | Preparation of substituted phenols | Norbert Goetz, Peter Tavs, Leopold Hupfer, Karl Baer | 1985-08-27 |
| 4301084 | Process for the preparation of carboxylic acid esters of .beta.-formyl-crotyl alcohol by an allyl rearrangement | Axel Nissen, Bernd Meissner | 1981-11-17 |
| 4255333 | Preparation of indolenines | Hans-Joachim Opgenorth, Horst Scheuermann, Axel Nissen | 1981-03-10 |
| 4240963 | Preparation of indolenines | Axel Nissen, Hans-Joachim Opgenorth, Horst Scheuermann, Hans Mueller, Wolfgang Schulte | 1980-12-23 |