Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867912 | Highly heat-resistant polyaryl ether ketones | Gerhard Heinz, Juergen Koch, Manfred Eggersdorfer, Helmut Muenstedt, Peter Ittemann | 1989-09-19 |
| 4853481 | Preparation of alkyl-substituted aromatic ketones | Manfred Eggersdorfer, Walter Grosch, Alfred Schuhmacher, Hardo Siegel | 1989-08-01 |
| 4837296 | Preparation of polyaryl ether ketones | Gerhard Heinz, Juergen Koch, Manfred Eggersdorfer | 1989-06-06 |
| 4835242 | Aryl ether ketones | Manfred Eggersdorfer, Gerhard Heinz, Juergen Koch | 1989-05-30 |