Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9873757 | Polyester polyol, composition for polyurethane, composition for polyurethane foam, polyurethane resin, and polyurethane foam | Tamotsu Kunihiro, Atsushi Miyata, Shinsuke Matsumoto, Kanae Morishita | 2018-01-23 |
| 8236869 | Polyether polyol, rigid polyurethane foam and processes for production thereof | Atsushi Miyata, Nobuhito Koga, Shinsuke Matsumoto, Kazuhiko Ohkubo | 2012-08-07 |
| 6156864 | Preparation of flexible polyurethane foams | Kazuhiko Ohkubo, Yoshitsugu Sakaki, Tamotsu Kunihiro, Ariko Nishikawa, Tsukuru Izukawa | 2000-12-05 |
| 5777175 | Preparation of polyoxyalkylene polyols, polymer polyols and flexible polyurethane foams | Kazuhiko Ohkubo, Yoshitsugu Sakaki, Tamotsu Kunihiro, Ariko Nishikawa, Tsukuru Izukawa +3 more | 1998-07-07 |
| 5545712 | Preparation process for polyoxyalkylene polyol | Tsukuru Izukawa, Kazuhiko Ohkubo, Yoshitsugu Sakaki | 1996-08-13 |
| 5468840 | Preparation process of polyoxyalkylene polyols and process of alkylene oxide recovery | Tsukuru Izukawa, Kazuhiko Ohkubo, Yoshitsugu Sakaki | 1995-11-21 |