Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6924378 | Method for production of aziridines and N-vinylamides | Yoshihisa Oka | 2005-08-02 |
| 6646083 | Crosslinked polymers containing tertiary amine and/or quaternary ammonium salt structures, processes for making and uses thereof | Yoshiaki Hirano, Takehiko Morita, Takafumi Kubo, Hiroshi Yamamoto, Yutaka Sugiyama | 2003-11-11 |
| 6566534 | Processes for the preparation of aziridine compounds and vapor-phase reaction processes | Yoshihisa Oka | 2003-05-20 |
| 6550485 | Washing method for distillation system of nitrogen-containing polymerizable monomers | Yoshihisa Oka | 2003-04-22 |
| 6300507 | Process of manufacturing ethylene oxide | Yoshihisa Oka | 2001-10-09 |