Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5026925 | Method of producing catechol and hydroquinone | Karl-Heinz Drauz, Axel Kleeman, Gebhard Ritter | 1991-06-25 |
| 4921983 | Method for the continuous epoxidation of olefins | Rainer Siegmeier, Willi Hofen, Helmut Maurer | 1990-05-01 |
| 4879057 | Aqueous bleaching agent suspensions containing peroxycarboxylic acid, method for their preparation and use | Manfred Dankowski, Thomas Lieser, Wolfgang Leonhardt, Manfred Diehl | 1989-11-07 |
| 4825011 | Method of preparing substituted dihydroxy-benzenes | Karl-Heinz Drauz, Axel Kleeman, Gebhard Ritter | 1989-04-25 |
| 4790949 | Aqueous bleaching agent suspensions containing peroxycarboxylic acid, method for their preparation and use | Manfred Dankowski, Thomas Lieser, Wolfgang Leonhardt | 1988-12-13 |
| 4720593 | Process for the production of 1-methylcyclopropanecarboxaldehyde | Juan Andrade, Klaus Kohler | 1988-01-19 |
| 4691062 | Process for the production of 4-chloro-butanals | Juan Andrade, Klaus Kohler | 1987-09-01 |
| 4680420 | Process for the producing 2,5-dimethoxytetrahydrofuran and 2,5-diethoxytetrahydrofuran | Juan Andrade | 1987-07-14 |
| 4626603 | Process for the continuous production of vicinal diols | Rainer Siegmeier, Helmut Maurer | 1986-12-02 |
| 4621072 | Process for preparing abrasion-resistant coated catalysts | Dietrich Arntz, Werner Burkhardt, Johannes Heilos, Reinhard Manner | 1986-11-04 |
| 4608443 | Method for the preparation of 1,4-butandial | Juan Andrade, Marc Samson | 1986-08-26 |
| 4605795 | Continuous process for the production of pentanediol-1,2 | Rainer Siegmeier, Helmut Maurer, Gunter Hering | 1986-08-12 |
| 4579979 | Method for preparation of acetals | Juan Andrade, Dietrich Arntz, Michael Kraft | 1986-04-01 |
| 4539409 | Process for preparing aromatic nitriles | Dietrich Arntz, Werner Burkhardt, Johannes Heilos, Reinhard Manner | 1985-09-03 |
| 4521618 | Process for preparing acrylic or methacrylic acid | Dietrich Arntz, Werner Burkhardt, Johannes Heilos, Reinhard Manner | 1985-06-04 |
| 4447615 | Process for the purification of nicotinic acid amide I | Helmut Beschke, Franz-Ludwig Dahm, Heinz Friedrich | 1984-05-08 |
| 4447614 | Process for the purification of nicotinic acid amide | Helmut Beschke, Franz-Ludwig Dahm, Heinz Friedrich | 1984-05-08 |
| 4442308 | Process for preparing by catalytic oxidation in oxygen-containing gas mixtures, acrolein from propylene and methacrolein from isobutylene or tertiary butanol | Dietrich Arntz, Johannes Heilos | 1984-04-10 |
| RE31381 | Process for the preparation of propylene oxide | Gerd Schreyer, Otto Weiberg, Rolf Wirthwein, Helmut Waldmann, Hermann Seifert +2 more | 1983-09-13 |