Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5532325 | Process for producing high stiffness polypropylene | Takahiro Oka | 1996-07-02 |
| 5140062 | Continuous process for producing high molten viscoelastic polypropylene of ethylene-propylene copolymer | Takahiro Oka, Shunji Kawazoe | 1992-08-18 |
| 4981938 | Highly crystalline polypropylene | Tohru Hanari, Ichiro Namiki, Kinya Mori, Kiyoshi Matsuda | 1991-01-01 |
| 4970280 | Continuous process for producing high molten viscoelastic polypropylene or ethylene-propylene copolymer | Takahiro Oka, Shunji Kawazoe | 1990-11-13 |
| 4771103 | Process for continuously producing propylene-ethylene block copolymer | Takahiro Oka | 1988-09-13 |
| 4760113 | Process for continuously producing a high-melt viscoelastic ethylene-propylene copolymer | Shunji Kawazoe, Takahiro Oka | 1988-07-26 |
| 4582878 | High-rigidity ethylene-propylene copolymer and process for producing same | Katsumi Kumahara, Takakiyo Harada, Takahiro Oka, Akihiro Sato | 1986-04-15 |
| 4550144 | Propylene-ethylene copolymers for high-rigidity molded products and process for producing the same | Katsumi Kumahara, Takakiyo Harada, Takahiro Oka, Akihiro Sato | 1985-10-29 |
| 4526931 | Whitening-resistant, highly melt-viscoelastic ethylene-propylene copolymer and process for producing the same | Takakiyo Harada, Katsumi Kumahara, Shunji Kawazoe, Akihiro Sato | 1985-07-02 |
| 4522994 | Polypropylene resin for high-rigidity molded products | Katsumi Kumahara, Takakiyo Harada, Takahiro Oka, Akihiro Sato | 1985-06-11 |
| 4510292 | Ethylene-propylene copolymers for foaming and process for producing the same | Kenjiro Obama, Shunji Kawazoe, Takahiro Oka, Akihiro Satoh | 1985-04-09 |
| 4500682 | High melt-viscoelastic polypropylene for post-processed sheets and for blow molding | Kenjiro Obama, Shunji Kawazoe, Takahiro Oka, Akihiro Sato | 1985-02-19 |
| 4499247 | High-rigidity, high-melt-viscoelasticity polypropylene and process for producing the same | Kenjiro Obama, Shunji Kawazoe, Takahiro Oka, Akihiro Satoh | 1985-02-12 |
| 4483971 | Process for producing terpolymers of propylene, ethylene and another .alpha . | Akihiro Sato, Takeshi Suzuki, Kazutsune Kikuta, Toshihiro Uwai, Kenji Matsuda +1 more | 1984-11-20 |
| 4304890 | Method for producing propylene copolymers using a catalyst activated prior to copolymerization | Takeshi Suzuki | 1981-12-08 |
| 4245062 | Process for producing propylene-ethylene copolymers | Takeshi Suzuki, Ryohichi Yasunaga, Hironaka Sekine | 1981-01-13 |