Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5095049 | Process for producing a low-particle-content transparent thermoplastic resin solution | Kenji Maeda, Toshikazu Umemura, Yuki Ohtani | 1992-03-10 |
| 4255557 | Preparing polycarbonate oligomers by reacting phosgene with an aqueous solution containing a salt of a dihydric phenol in an organic solvent which comprises previously cooling the aqueous solution and carrying out the reaction at a low temperature | Hiroyuki Yoshizaki, Sigeo Kondoh | 1981-03-10 |