Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798836 | Bis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for synthetic polymers | Motonobu Minagawa, Yutaka Nakahara, Kazuo Sugibuchi | 1989-01-17 |
| 4767834 | Vinyl benzyl 2,2,6,6-tetramethyl piperidines | William E. Leistner, Yutaka Nakahara, Mitsuharu Kanai | 1988-08-30 |
| 4692485 | Vinyl benzyl 2,2,6,6-tetramethyl piperidines | William E. Leistner, Yutaka Nakahara, Mitsuharu Kanai | 1987-09-08 |
| 4418196 | Process for preparing triacetone amine | Yutaka Nakahara, Naohiro Kubota, Tohru Haruna | 1983-11-29 |
| 4405737 | N-2-Hydroxypropyl piperidines and compositions thereof | Naohiro Kubota, Kazuo Sugibuchi | 1983-09-20 |
| 4252958 | Process for preparing 2,2,6,6-Tetramethyl-4-oxopiperidine | Naohiro Kubota, Yutaka Nakahara | 1981-02-24 |