Issued Patents 1989
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886871 | Melt-stable poly(arylene thioetherketone) and production process thereof | Yoshikatsu Satake, Takashi Kaneko, Yutaka Kobayashi, Yo Iizuka, Takayuki Katto | 1989-12-12 |
| 4873283 | Molded or formed poly(arylene thioether-ketone) articles | Yoshikatsu Satake, Yo Iizuka, Toshitaka Kouyama, Takayuki Katto | 1989-10-10 |
| 4868240 | Polyarylene thioether of high crystallizing rate and a process for producing the same | Yukio Ichikawa, Takayuki Katto | 1989-09-19 |
| 4863669 | Process for forming polyarylenethioether stretched blow-molded vessel | Toshitaka Kouyama, Takayuki Katto, Takao Iwasaki, Yo Iizuka | 1989-09-05 |
| 4826906 | Poly(arylene thioether-ketone) compositions improved in both melt stability and crystallinity | Yoshikatsu Satake, Ken Kashiwadate, Yo Iizuka, Toshitaka Kouyama, Takayuki Katto | 1989-05-02 |
| 4820759 | Polyarylene thiother composition | Yukio Ichikawa, Takayuki Katto | 1989-04-11 |
| 4816335 | High-quality polyarylene-thioether fibers and method for production thereof | Toshitaka Kouyama, Harunobu Egawa, Yo Iizuka | 1989-03-28 |
| 4814430 | Process for producing poly(arylene sulfide) of reduced alkali metal content | Takao Iwasaki, Yo Iizuka, Takayuki Katto | 1989-03-21 |
| 4812539 | Polyarylene sulfide preparation in titanium reaction vessel with two distinct temperature ranges | Yo Iizuka, Takao Iwasaki, Takayuki Katto | 1989-03-14 |
| 4810566 | Highly crystallized molded polyarylene thioether and process for producing it | Yukichika Kawakami, Takao Iwasaki | 1989-03-07 |
| 4801416 | Transparent and little colored polyarylenethioether primary melt molding, preparation and utilization thereof | Akio Kobayashi, Toshitaka Kouyama, Yo Iizuka, Takayuki Katto | 1989-01-31 |
| 4795671 | Para-phenylene sulfide block copolymers, process for the production of the same and use thereof | Takayuki Katto, Yo Iizuka, Takao Iwasaki, Toshitaka Kouyama | 1989-01-03 |