Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885323 | Poly-2,2,6,6-tetramethyl piperidyl amino spiro glycol ether-1,3,5-triazines | Yutaka Nakahara, Toshihiro Shibata, Etsuo Tobita | 1989-12-05 |
| 4820844 | Radiation sensitizer | Tsutomu Kagiya, Yutaka Nakahara, Ryoji Kimura, Tsuneo Tsubakimoto, Ryoichi Oshiumi +1 more | 1989-04-11 |
| 4798836 | Bis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for synthetic polymers | Yutaka Nakahara, Bunji Hirai, Kazuo Sugibuchi | 1989-01-17 |