Issued Patents All Time
Showing 1–25 of 52 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 |
| 4743688 | Poly-2,2,6,6-tetramethyl piperidyl amino spiro glycol ether-1,3,5-triazines | Yutaka Nakahara, Toshihiro Shibata, Etsuo Tobita | 1988-05-10 |
| 4698381 | "N,N',N""-tris((2,2,6,6-tetramethyl-4-piperidyl)triazinyl) undecane triamines as stabilizers for synthetic polymers" | Yutaka Nakahara, Toshihiro Shibata, Ryozo Arata | 1987-10-06 |
| 4673701 | Alkylidene bisphenol phosphites and phosphates having 2,2,6,6-tetramethyl piperidinyl groups and synthetic resin composition | Yutaka Nakahara, Toshihiro Shibata, Ryozo Arata | 1987-06-16 |
| 4623685 | Thermosetting synthetic resin lacquer compositions of improved light stability | Yutaka Nakahara, Toshihiro Shibata, Ryozo Arata | 1986-11-18 |
| 4529760 | Oligomers of 2,2,6,6-tetramethylpiperidinol polycarboxylic acid esters and synthetic polymer compositions | William E. Leistner, Yutaka Nakahara, Tohru Haruna, Atsushi Nishimura | 1985-07-16 |
| 4525506 | Polyhydric alcohol ethers of 2,2,6,6-tetramethyl-4-piperidone ketals and synthetic resin compositions | Naohiro Kubota, Toshihiro Shibata, Ryozo Arata | 1985-06-25 |
| 4500663 | Light stabilizing N,N,N-tris(2,2,6,6-tetramethyl-4-piperidone ketal)-1,3,5-triazine derivatives and light stabilized synthetic resin compositions | Naohiro Kubota, Toshihiro Shibata, Ryozo Arata | 1985-02-19 |
| 4499220 | Copolymer light stabilizers having at least one 2,2,6,6-tetraalkyl piperidyl group and synthetic resin compositions containing the same | Naohiro Kubota, Toshihiro Shibata | 1985-02-12 |
| 4491643 | Bis(2,2,6,6-tetramethylpiperidyl-1,3,5-triazinyl)-spirodiamines and spiroglycol ethers and synthetic resin compositions containing the same | Yutaka Nakahara, Toshihiro Shibata, Etsuo Tobita | 1985-01-01 |
| 4477616 | Tetra-(2,2,6,6- tetramethyl-4-piperidinyl)-3-methyl-5-(1'2'-biscarboxylate)-ethyl-cyclohe xane or 3-cyclohexene-1,2-dicarboxylates and synthetic resin compositions containing the same | Yutaka Nakahara, Toshihiro Shibata | 1984-10-16 |
| 4469828 | Alkylthiopropionyl hydrazino triazines and synthetic resin compositions | Tohru Haruna, Masayuki Takahashi | 1984-09-04 |
| 4468488 | Poly(piperidylamine) alkanes and synthetic resin compositions stabilized thereby | Yutaka Nakahara, Toshihiro Shibata, Ryozo Arata | 1984-08-28 |
| 4463112 | Phenylethylidene-substituted phenyl polyphosphites | William E. Leistner, Yutaka Nakahara, Kazumi Kitsukawa | 1984-07-31 |
| 4460725 | Polyethers containing 2,2,6,6-tetramethyl piperidinyl carboxylic acid ester groups and synthetic resin compositions | William E. Leistner, Naohiro Kubota, Toshihiro Shibata, Ryozo Arata | 1984-07-17 |
| 4423174 | Synthetic resin compositions containing 2,2,6,6-tetramethyl piperidyl ethers | Naohiro Kubota, Ryoji Kimura | 1983-12-27 |
| 4416797 | Chlorinated organic compounds having their resistance to deterioration enhanced by 1,3-dicarbonyl compounds | Tetsuyu Inoue, Naoyasu Kurita | 1983-11-22 |
| 4415688 | Poly(piperidylamine) alkanes and synthetic resin compositions stabilized thereby | Yutaka Nakahara, Toshihiro Shibata, Ryozo Arata | 1983-11-15 |
| 4415689 | Synthetic resin compositions containing 2,2,6,6-tetramethyl piperidinyl triazines | Yutaka Nakahara, Toshihiro Shibata | 1983-11-15 |
| 4396735 | Synergistic light stabilizer compositions for synthetic resins and resin compositions containing the same | Naohiro Kubota, Toshihiro Shibata | 1983-08-02 |
| RE31261 | 2,2,6,6-Tetrasubstituted-4-piperidyl carboxy heterocyclic compounds as stabilizers for synthetic polymers | Naohiro Kubota, Toshihiro Shibata | 1983-05-31 |
| 4381360 | 1,3-Dicarbonyl compounds and polyvinyl halide resin compositions containing the same | William E. Leistner, Kouji Tsuruga, Masashi Harada | 1983-04-26 |
| 4378443 | 2,2,6,6-Tetraalkyl-4-piperidyl-bix-spiro-ethers as light stabilizers for synthetic polymers | Naohiro Kubota, Toshihiro Shibata | 1983-03-29 |