Issued Patents All Time
Showing 1–25 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12359062 | Polycarbonate resin, method for producing same, polycarbonate resin composition and molded body | Keisuke Shimokawa, Takehiko Isobe | 2025-07-15 |
| 12304998 | Polycarbonate resin | Keisuke Shimokawa, Takehiko Isobe, Jungo TAGUCHI | 2025-05-20 |
| 12202786 | Method for producing aromatic nitrile compound and method for producing carbonate ester | Takehiko Isobe, Keisuke Shimokawa, Ryotaro UMEZU | 2025-01-21 |
| 12129230 | Dialkyl carbonate production method | Hongyu Liu, Takehiko Isobe, Yousuke Shinkai | 2024-10-29 |
| 11970442 | Method for producing carbonic ester | Takehiko Isobe, Hongyu Liu, Yousuke Shinkai, Ryotaro UMEZU | 2024-04-30 |
| 11673856 | Method for producing aromatic nitrile compound and method for producing carbonate ester | Takehiko Isobe, Keisuke Shimokawa, Ryotaro UMEZU | 2023-06-13 |
| 11596936 | Method for regenerating catalyst and method for producing carbonate ester | Takehiko Isobe, Hongyu Liu, Yousuke Shinkai, Ryotaro UMEZU | 2023-03-07 |
| 11427679 | Polycarbonate resin composition | Keisuke TOMITA, Takehiko Isobe, Keisuke Shimokawa, Jungo TAGUCHI | 2022-08-30 |
| 11161816 | Method for producing aromatic nitrile compound and method for producing carbonic acid ester | Yousuke Shinkai, Hongyu Liu, Takehiko Isobe, Yoshinori Isahaya | 2021-11-02 |
| 11142506 | Diaryl carbonate and method for producing the same, and method for producing an aromatic polycarbonate resin | Jungo TAGUCHI, Yoshinori Isahaya | 2021-10-12 |
| 11021571 | Manufacturing method for high molecular weight aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2021-06-01 |
| 11014869 | Method for producing dialkyl carbonate | Keisuke Shimokawa, Takehiko Isobe, Hongyu Liu | 2021-05-25 |
| 10927216 | Manufacturing method for high molecular weight aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2021-02-23 |
| 10894860 | High molecular weight aromatic polycarbonate resin manufacturing method | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2021-01-19 |
| 10793524 | Method for producing aromatic nitrile compound and method for producing carbonic acid ester | Yousuke Shinkai, Hongyu Liu, Takehiko Isobe, Yoshinori Isahaya | 2020-10-06 |
| 10584092 | Method for producing aromatic nitrile compound and method for producing carbonate ester | Yousuke Shinkai, Hongyu Liu, Yoshinori Isahaya, Keiichi Tomishige, Yoshinao Nakagawa +3 more | 2020-03-10 |
| 10053537 | High-fluidity polycarbonate copolymer, process for production highly polymerized aromatic polycarbonate resin and aromatic polycarbonate compound | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2018-08-21 |
| 9822218 | Process for producing a high molecular-weight aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +3 more | 2017-11-21 |
| 9701788 | Method for producing branched aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2017-07-11 |
| 9546249 | Process for preparing highly polymerized aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +3 more | 2017-01-17 |
| 9499661 | Process for producing highly polymerized aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2016-11-22 |
| 9458290 | Process for preparing highly polymerized aromatic polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2016-10-04 |
| 9428608 | Aromatic polycarbonate resin composition | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2016-08-30 |
| 9353216 | High-fluidity polycarbonate copolymer, process for production highly polymerized aromatic polycarbonate resin and aromatic polycarbonate compound | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2016-05-31 |
| 9243106 | Method for continuous production of high molecular weight polycarbonate resin | Yoshinori Isahaya, Atsushi Hirashima, Maki Ito, Jun Hayakawa, Takehiko Isobe +2 more | 2016-01-26 |