Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886871 | Melt-stable poly(arylene thioetherketone) and production process thereof | Yoshikatsu Satake, Takashi Kaneko, Yutaka Kobayashi, Takayuki Katto, Zenya Shiiki | 1989-12-12 |
| 4873283 | Molded or formed poly(arylene thioether-ketone) articles | Yoshikatsu Satake, Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki | 1989-10-10 |
| 4863669 | Process for forming polyarylenethioether stretched blow-molded vessel | Toshitaka Kouyama, Takayuki Katto, Takao Iwasaki, Zenya Shiiki | 1989-09-05 |
| 4826906 | Poly(arylene thioether-ketone) compositions improved in both melt stability and crystallinity | Yoshikatsu Satake, Ken Kashiwadate, Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki | 1989-05-02 |
| 4816335 | High-quality polyarylene-thioether fibers and method for production thereof | Toshitaka Kouyama, Harunobu Egawa, Zenya Shiiki | 1989-03-28 |
| 4814430 | Process for producing poly(arylene sulfide) of reduced alkali metal content | Takao Iwasaki, Takayuki Katto, Zenya Shiiki | 1989-03-21 |
| 4812539 | Polyarylene sulfide preparation in titanium reaction vessel with two distinct temperature ranges | Takao Iwasaki, Takayuki Katto, Zenya Shiiki | 1989-03-14 |
| 4801416 | Transparent and little colored polyarylenethioether primary melt molding, preparation and utilization thereof | Akio Kobayashi, Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki | 1989-01-31 |
| 4795671 | Para-phenylene sulfide block copolymers, process for the production of the same and use thereof | Zenya Shiiki, Takayuki Katto, Takao Iwasaki, Toshitaka Kouyama | 1989-01-03 |