Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841060 | Vapor-phase intramolecular dehydration reaction of alkanolamines | Yuuji Shimasaki, Michio Ueshima | 1989-06-20 |
| 4833248 | Catalyst for vapor-phase intramolecular dehydration reaction of alkanolamines | Yuuji Shimasaki, Hideaki Tuneki, Hitoshi Yano, Michio Ueshima | 1989-05-23 |