Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794164 | Process for producing a polyarylene sulfide of excellent handling property and a polyarylene sulfide produced by the process thereof | Takao Iwasaki, Takayuki Katto, Zenya Shiiki | 1988-12-27 |
| 4785057 | Para-phenylene sulfide block copolymer, process for the production of the same | Zenya Shiiki, Takayuki Katto, Takao Iwasaki, Toshitaka Kouyama | 1988-11-15 |
| 4777228 | Biaxially oriented paraphenylene sulfide block copolymer film and process for producing the same | Toshiya Mizuno, Takao Ichii | 1988-10-11 |
| 4774298 | Process for producing biaxially oriented paraphenylene sulfide block copolymer film | Toshiya Mizuno, Takao Ichii, Hideyuki Yasumi | 1988-09-27 |
| 4769426 | Process for preparation of polyarylene thioethers having high melt crystallization temperature | Takao Iwasaki, Toshitaka Kouyama, Zenya Shiiki | 1988-09-06 |
| 4761468 | Process for preparing polyarylene thioether having thiol/thiolate end group concentration of 10 micro mole/g or less | Tsuneo Okamoto, Takao Iwasaki, Zenya Shiiki | 1988-08-02 |
| 4745167 | Polyarylene sulfide preparation in titanium reaction vessel with two distinct temperature ranges | Takao Iwasaki, Takayuki Katto, Zenya Shiiki | 1988-05-17 |
| 4659789 | Phenylene sulfide resin compositions | Takayuki Katto, Masahito Tada, Toshitaka Kouyama | 1987-04-21 |
| 4645826 | Process for production of high to ultra-high molecular weight linear polyarylenesulfides | Takao Iwasaki, Takayuki Katto, Zenya Shiiki | 1987-02-24 |
| 4537953 | Process for producing aromatic sulfide polymer with alkaline earth metal oxide dehydrating agent | Yukichika Kawakami, Zenya Shiiki | 1985-08-27 |
| 4514558 | Process for producing aromatic sulfide polymer with anhydrous amorphous vitreous complex dehalogenation agent | Zenya Shiiki, Yukichika Kawakami | 1985-04-30 |
| 4495332 | Process for producing aromatic sulfide polymers | Zenya Shiiki, Yukichika Kawakami | 1985-01-22 |
| 4337324 | Vinyl chloride resin composition | Haruhiko Yusa, Humio Akutsu | 1982-06-29 |
| 4277573 | Vinyl chloride resin and alkyl methacrylate resin processing aid composition | Susumu Midorikawa, deceased, Kiyoshi Midorikawa, Yumi Midorikawa, heir | 1981-07-07 |
| 4268636 | Vinyl chloride resin composition with processing aid | Haruhiko Yusa, Susumu Midorikawa, deceased, by Taeko Midorikawa, heir | 1981-05-19 |
| 4206292 | Vinyl chloride resin composition containing polymeric processing aid | Masaki Ohya, Susumu Midorikawa, deceased | 1980-06-03 |