Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885112 | Surface active secondary amidoamino acid or salt compounds | Kohshiro Sotoya, Makoto Kubo, Kazuhiko Okabe, Masanobu Tanigaki, Hajime Hirota | 1989-12-05 |
| 4846947 | Process for preparing an alkanolammonium salt or ammonium salt of surface active agents | Kohshiro Sotoya, Makoto Kubo, Kazuhiko Okabe, Masanobu Tanigaki | 1989-07-11 |