Issued Patents All Time
Showing 51–75 of 102 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5587437 | Process of producing vinyl chloride type polymer | Fumiaki Adachi, Yoshihrio Shirota, Yoshitaka Okuno | 1996-12-24 |
| 5543175 | Method for forming a scale preventive coating film on inner wall surfaces of a polymerization vessel | Toshihiko Nakano, Yoshitaka Okuno | 1996-08-06 |
| 5502123 | Process for preparing vinyl chloride polymer | Tadayoshi Hiyama, Toru Yokota | 1996-03-26 |
| 5478900 | Process for preparing vinyl chloride polymer of quality | Tadayoshi Hiyama | 1995-12-26 |
| 5449723 | Method for the preparation of a vinyl chloride-based polymer | Shuji Ohnishi | 1995-09-12 |
| 5447999 | Vinyl chloride polymerization with recycle return projecting into gas phase region of reactor | Takuya Ueda, Yoshihiro Shirota, Yoshihiko Hirai, Toshiaki Maruyama | 1995-09-05 |
| 5448004 | Process for producing vinyl chloride polymer | Shigehiro Hoshida | 1995-09-05 |
| 5444130 | Process for producing vinyl chloride-based polymer | Shuji Ohnishi | 1995-08-22 |
| 5444131 | Polymerization process with recycle line containing screen with rodlike projection | Shuji Ohnishi, Yoichi Tanifuji | 1995-08-22 |
| 5420215 | Process for producing vinyl chloride-based polymer | Shuji Ohnishi | 1995-05-30 |
| 5403899 | Method for preparing powder including adding fluoro non-ionic surfactant after 70% polymerization is reached of vinyl chloride polymers | Toshimichi Koga | 1995-04-04 |
| 5378781 | Process for producing high-quality vinyl chloride polymers using a perester or percarbonate and 1-cyclohexyl-1-methylethyl peroxyneodecanoate | Makoto Fujiwara | 1995-01-03 |
| 5376747 | Process for producing vinyl chlorine-based polymer via continuous or intermittent addition of dispersing stabilizer | Minoru Shigemitsu | 1994-12-27 |
| 5362828 | Process for the production of vinyl chloride polymers using a combination of monomer-soluble polymerization initiators | Makoto Fujiwara | 1994-11-08 |
| 5357011 | Process for producing vinyl chloride-based polymers | Shuji Ohnishi | 1994-10-18 |
| 5348708 | Polymerizing apparatus | Shuji Ohnishi | 1994-09-20 |
| 5342906 | Method for the suspension polymerization of vinyl chloride monomer | Toshimichi Koga | 1994-08-30 |
| 5328666 | Polymerizing apparatus | Shuji Ohnishi | 1994-07-12 |
| 5310832 | Process for producing vinyl chloride-based polymer | Shuji Ohnishi | 1994-05-10 |
| 5286796 | Method for the preparation of polyvinyl chloride resin | Ichiro Kaneko | 1994-02-15 |
| 5282680 | Apparatus for continuous polymerization | Shuji Ohnishi, Minoru Shigemitsu, Yasuhiro Takahashi, Hajime Kitamura | 1994-02-01 |
| 5235012 | Method for polymerizing vinyl chloride with controlled water addition | Ichiro Kaneko, Toshimichi Koga | 1993-08-10 |
| 5212265 | Method for recovering unreacted monomers after preparation of vinylic polymer | Minoru Shigemitsu | 1993-05-18 |
| 5210158 | Suspension polymerization of vinyl chloride with heating of reactor surfaces | Shigehiro Hoshida, Yoshihiro Shirota | 1993-05-11 |
| 5204421 | Process for preparing vinyl chloride polymer improved in plasticizer take-up by two-stage addition of dispersion stabilizers | Shigehiro Hoshida | 1993-04-20 |