Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814430 | Process for producing poly(arylene sulfide) of reduced alkali metal content | Yo Iizuka, Takayuki Katto, Zenya Shiiki | 1989-03-21 |
| 4812539 | Polyarylene sulfide preparation in titanium reaction vessel with two distinct temperature ranges | Yo Iizuka, Takayuki Katto, Zenya Shiiki | 1989-03-14 |
| 4810566 | Highly crystallized molded polyarylene thioether and process for producing it | Yukichika Kawakami, Zenya Shiiki | 1989-03-07 |
| 4795671 | Para-phenylene sulfide block copolymers, process for the production of the same and use thereof | Zenya Shiiki, Takayuki Katto, Yo Iizuka, Toshitaka Kouyama | 1989-01-03 |
| 4794164 | Process for producing a polyarylene sulfide of excellent handling property and a polyarylene sulfide produced by the process thereof | Yo Iizuka, Takayuki Katto, Zenya Shiiki | 1988-12-27 |
| 4785057 | Para-phenylene sulfide block copolymer, process for the production of the same | Zenya Shiiki, Takayuki Katto, Yo Iizuka, Toshitaka Kouyama | 1988-11-15 |
| 4769426 | Process for preparation of polyarylene thioethers having high melt crystallization temperature | Yo Iizuka, Toshitaka Kouyama, Zenya Shiiki | 1988-09-06 |
| 4769442 | Process for treating a polymer slurry | Tsuneo Okamoto | 1988-09-06 |
| 4761468 | Process for preparing polyarylene thioether having thiol/thiolate end group concentration of 10 micro mole/g or less | Tsuneo Okamoto, Yo Iizuka, Zenya Shiiki | 1988-08-02 |
| 4746698 | Method of preventing corrosion of apparatus for melt-processing polyarylene thioethers | Toshitaka Kouyama, Takayuki Katto, Zenya Shiiki | 1988-05-24 |
| 4745167 | Polyarylene sulfide preparation in titanium reaction vessel with two distinct temperature ranges | Yo Iizuka, Takayuki Katto, Zenya Shiiki | 1988-05-17 |
| 4645826 | Process for production of high to ultra-high molecular weight linear polyarylenesulfides | Yo Iizuka, Takayuki Katto, Zenya Shiiki | 1987-02-24 |
| 4614324 | Mold for producing concrete pipe | Kiichi Yamashita, Junpei Tanizawa | 1986-09-30 |
| 4613654 | Polyarylenesulfide complexes, processes for production and uses thereof | Takayuki Katto, Toshitaka Kouyama, Zenya Shiiki | 1986-09-23 |
| 4540838 | Process for producing chloroprene | Higashi Ito, Seiichi Watanabe | 1985-09-10 |
| 4501870 | Fine particles of polyvinyl chloride and process for producing the same | Kunizoh Kidoh, Hideki Wakamori, Fujio Suzuki | 1985-02-26 |
| 4401806 | Process for producing graft copolymer | Hiroshi Hagiwara | 1983-08-30 |