Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845185 | Soluble copolyimide from 9,9-bis (4-amino phenyl) fluorene | Takero Teramoto, Kazuaki Harada | 1989-07-04 |
| 4833214 | Soluble heat-resistant aromatic polyamide terminated with aromatic amido moieties | Takero Teramoto, Kazuaki Harada | 1989-05-23 |
| 4820868 | Process for preparation of naphthalene-2,6-dicarboxylic acid dialkali metal salts | Shuichi Mitamura, Koichi Fujishiro | 1989-04-11 |