Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6554965 | Rectification column for isolating pure substances from high boiling air-and/or temperature sensitive substances | Horst Hartmann, Wolfram Burst, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more | 2003-04-29 |
| 6184420 | Preparation of unsaturated ketones | Joaquim Henrique Teles, Norbert Rieber, Klaus Breuer, Dirk Demuth, Hartmut Hibst +2 more | 2001-02-06 |
| 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, Harald Laas, 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, Bernhard Bockstiegel, Harald Laas, Bernhard Schulz, Peter D. Schmitt +1 more | 1999-12-21 |
| 5994589 | Process for preparing 2,5,6-trimethyl-2-cyclohexen-1-one | Detlef Ruff, Wolfram Burst, Manfred Stroezel | 1999-11-30 |
| 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, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more | 1999-09-14 |