Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873367 | Method for preparing 4-hydroxy-3-phenylbenzoic acid | Patricia P. Anderson, Tohru Takekoshi | 1989-10-10 |
| 4808671 | Catalytic method of preparing carboxy derivatives of polyphenylene ethers | — | 1989-02-28 |