Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868283 | Process for the production of polyphenylene ethers with reduced inherent color | Martin Bartmann | 1989-09-19 |
| 4814431 | Process for improving the color quality of polyphenylene oxide with unsaturated carboxylic acid ester | Martin Bartmann | 1989-03-21 |