Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867912 | Highly heat-resistant polyaryl ether ketones | Gerhard Heinz, Juergen Koch, Jochem Henkelmann, Helmut Muenstedt, Peter Ittemann | 1989-09-19 |
| 4853481 | Preparation of alkyl-substituted aromatic ketones | Jochem Henkelmann, Walter Grosch, Alfred Schuhmacher, Hardo Siegel | 1989-08-01 |
| 4837296 | Preparation of polyaryl ether ketones | Gerhard Heinz, Juergen Koch, Jochem Henkelmann | 1989-06-06 |
| 4835242 | Aryl ether ketones | Jochem Henkelmann, Gerhard Heinz, Juergen Koch | 1989-05-30 |
| 4820882 | Preparation of beta-aryl alcohols | Heinz Eckhardt | 1989-04-11 |
| 4816606 | Continuous preparation of aldehydes and ketones | Karl Brenner, Wilhelm Ruppel, Harald Schultheiss, Hans-Ulrich Scholz | 1989-03-28 |