Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880905 | Process for producing organophosphazene polymers with chlorophosphazene | Yasuhiro Yoshikawa, Tetsuhiko Okamoto | 1989-11-14 |
| 4855389 | Process for producing phosphonitrile oligomers containing maleimidophenoxy group | Masayuki Furukawa, Tadaichi Nishikawa | 1989-08-08 |
| 4795621 | Process for the preparation of phosphonitrile chloride oligomer | Tetsuhiko Okamoto, Kazuhiko Fujikawa | 1989-01-03 |