Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31261 | 2,2,6,6-Tetrasubstituted-4-piperidyl carboxy heterocyclic compounds as stabilizers for synthetic polymers | Motonobu Minagawa, Toshihiro Shibata | 1983-05-31 |
| 4378443 | 2,2,6,6-Tetraalkyl-4-piperidyl-bix-spiro-ethers as light stabilizers for synthetic polymers | Motonobu Minagawa, Toshihiro Shibata | 1983-03-29 |
| 4351915 | 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers as stabilizers for synthetic polymers | Toshihiro Shibata, Kazuo Sugibuchi, Motonubu Minagawa | 1982-09-28 |
| 4336183 | 2,2,6,6-Tetramethyl-4-piperidyl carboxylic acid esters and amides of mono and poly alcohols, phenols and amines as stabilizers for synthetic polymers | Yutaka Nakahara, Toshihiro Shibata | 1982-06-22 |
| 4323684 | Process for preparing a 2,2,6,6-tetraalkyl-4-piperidyl spiro aliphatic ether | Toshihiro Shibata | 1982-04-06 |
| 4312804 | 2,2,6,6-Tetraalkyl-4-piperidyl alcohol esters of tetradecylene polycarboxylic acids as light stabilizers for synthetic polymers | Motonobu Minagawa, Toshihiro Shibata | 1982-01-26 |
| 4255301 | Glycol carbonate ester stabilizers for synthetic resins | Motonobu Minagawa, Yutaka Nakahara | 1981-03-10 |
| 4252958 | Process for preparing 2,2,6,6-Tetramethyl-4-oxopiperidine | Bunji Hirai, Yutaka Nakahara | 1981-02-24 |
| 4250312 | Process for preparing 4-piperidone spiroketal compounds | Yutaka Nakahara, Toshihiro Shibata | 1981-02-10 |
| 4250313 | Process for preparing 4-piperidone spiroketal compounds | Yutaka Nakahara, Toshihiro Shibata | 1981-02-10 |
| 4222931 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl ether alcohol or ether, phosphonic acid ester and phenolic antioxidant | Motonobu Minagawa, Yutaka Nakahara, Toshihiro Shibata | 1980-09-16 |
| 4219463 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester, .beta.-thioalkyl propionic acid ester and phenol | Motonobu Minagawa, Tohru Haruna, Toshihiro Shibata | 1980-08-26 |
| 4210577 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester, phosphonic acid ester and phenol | Motonobu Minagawa, Yutaka Nakahara, Toshihiro Shibata | 1980-07-01 |
| 4189409 | Process for preparing a methylenebis(2-hydroxy-4-alkoxybenzophenone) and acyloxymethyl 2-OH 4-alkoxy benzophenones | Motonobu Minagawa, Toshihiro Shibata | 1980-02-19 |
| 4186151 | Process for preparing a 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) | Toshihiro Shibata, Kazuo Sugibuchi | 1980-01-29 |