Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8604140 | Method for preventing fouling in chemical equipment and antifouling agent | Naoshi Nagai, Shiro Nakatsuka, Kazuoki Nakai, Kenji Sugimura, Yasushi Tohi +2 more | 2013-12-10 |
| 8445609 | Method for producing olefin polymer | Yasushi Tohi, Naoya AKIYAMA, Toshio Fujita, Masatoshi Chinaka | 2013-05-21 |
| 6329465 | Ethylene copolymer composition and uses thereof | Mamoru Takahashi, Takashi Nakagawa, Kenji Sugimura | 2001-12-11 |
| 6303713 | Graft modified ethylene .alpha.-olefin copolymer obtained by graft copolymerzing an ethylene/.alpha.-olefin copolymer with a polar monomer | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki | 2001-10-16 |
| 6225410 | Ethylene/.alpha.-olefin copolymer and process for preparing the same | Kenji Sugimura, Mamoru Takahashi, Takashi Nakagawa | 2001-05-01 |
| 6043325 | Process for olefin polymerization | Toshiyuki Tsutsui, Masaaki Ohgizawa, Tetsuhiro Matsumoto, Junichi Imuta | 2000-03-28 |
| 6001941 | Ethylene .alpha.-olefin copolymer obtained by copolymerizing ethylene with an .alpha.-olefin | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki | 1999-12-14 |
| 5916988 | Ethylene random copolymers | Toshiyuki Tsutsui, Akinori Toyota | 1999-06-29 |
| 5883205 | Process for the preparation of an ethylene copolymer and prepolymerized solid catalyst for olefin polymerization | Toshiyuki Tsutsui, Takashi Ueda | 1999-03-16 |
| 5840815 | Gas-phase or slurry polymerization process for the preparation of an olefin polymer | Toshiyuki Tsutsui, Takashi Ueda | 1998-11-24 |
| 5834557 | Graft modified ethylene/.alpha.-olefin copolymer composition | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki | 1998-11-10 |
| 5795838 | Olefin polymerization catalyst and process for olefin polymerization | Toshiyuki Tsutsui, Masaaki Ohgizawa, Tetsuhiro Matsumoto, Junichi Imuta | 1998-08-18 |
| 5714426 | Olefin polymerization catalyst | Toshiyuki Tsutsui, Akinori Toyota | 1998-02-03 |
| 5708080 | Graft modified ethylene/.alpha.-olefin copolymer | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki | 1998-01-13 |
| 5703180 | Catalyst for olefin polymerization, process for olefin polymerization using the same, ethylene/.alpha.-olefin copolymer, graft modified ethylene/.alpha.-olefin copolymer, and ethylene copolymer composition | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo | 1997-12-30 |
| 5639842 | Ethylene random copolymers | Toshiyuki Tsutsui, Akinori Toyota | 1997-06-17 |
| 5543377 | Olefin polymerization catalysts and methods of olefin polymerization | Toshiyuki Tsutsui | 1996-08-06 |
| 5539069 | Olefin polymerization catalysts and methods of olefin polymerization | Toshiyuki Tsutsui | 1996-07-23 |
| 5525689 | Process for preparing ethylene copolymers | Toshiyuki Tsutsui, Akinori Toyota | 1996-06-11 |
| 5464905 | Ethylene/.alpha.-olefin copolymer composition, graft modified ethylene/.alpha.-olefin copolymer composition, ethylene copolymer composition, and multi-stage olefin polymerization process | Toshiyuki Tsutsui, Mamoru Takahashi, Akira Todo, Seiji Ohta, Hajime Inagaki | 1995-11-07 |
| 5455316 | Olefin polymerization solid catalyst, olefin polymerization catalyst and olefin polymerization | Toshiyuki Tsutsui, Kunio Yamamoto | 1995-10-03 |
| 5374700 | Ethylene copolymer | Toshiyuki Tsutsui, Takashi Ueda | 1994-12-20 |
| 5308816 | Olefin polymerization solid catalyst, olefin polymerization catalyst and olefin polymerization | Toshiyuki Tsutsui, Kunio Yamamoto | 1994-05-03 |
| 5218071 | Ethylene random copolymers | Toshiyuki Tsutsui, Akinori Toyota | 1993-06-08 |
| 5126301 | Solid catalyst for polymerizing an olefin | Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa | 1992-06-30 |