Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6992227 | Process for producing 1, 1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Yoichiro Isota | 2006-01-31 |
| 6673973 | Method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Yoichiro Isota | 2004-01-06 |
| 6673974 | Process for production of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Yoichiro Isota | 2004-01-06 |
| 6673975 | Method for producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Yoichiro Isota | 2004-01-06 |
| 6326522 | Process for production of 1,3-di(2-p-hydroxyphenyl-2-propyl)benzene | Takafumi Tsujigami, Kenji Ekawa, Kenzo Tsujimoto, Kiyoshi Kumaki | 2001-12-04 |
| 6284931 | Process for producing 3, 3, 5-trimethylcyclohexylidenebisphenol | Yoichiro Isota, Hiroshi Takenaka, Kazuhiko Yao | 2001-09-04 |