Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6992227 | Process for producing 1, 1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Toru Nakaguchi | 2006-01-31 |
| 6673973 | Method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Toru Nakaguchi | 2004-01-06 |
| 6673974 | Process for production of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Toru Nakaguchi | 2004-01-06 |
| 6673975 | Method for producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane | Kazuhiko Yao, Kenji Ekawa, Toru Nakaguchi | 2004-01-06 |
| 6284931 | Process for producing 3, 3, 5-trimethylcyclohexylidenebisphenol | Toru Nakaguchi, Hiroshi Takenaka, Kazuhiko Yao | 2001-09-04 |
| 6118029 | Process for producing 3,3',5,5'-tetra-t butylbiphenol | Kazuhiko Yao, Mikio Kawahara | 2000-09-12 |
| 4675444 | Process for producing aminophenols | Fujihisa Matsunaga, Eiji Kato, Tsuyoshi Kimura | 1987-06-23 |