Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371647 | 2,6-Di-tertiary butyl phenyl pentaerythritol spiro bis-phosphites enhancing the stability to heat and light of synthetic resin | Yutaka Nakahara, Etsuo Tobita | 1983-02-01 |
| 4371646 | 2,6-Di-tertiary butyl phenyl phosphites and synthetic resin compositions having enhanced stability to heat and light | Yutaka Nakahara | 1983-02-01 |
| 4371651 | Stabilizer compositions and polyvinyl halide resin compositions containing 1,3-dicarbonyl compounds | William E. Leistner, Kouji Tsuruga, Masashi Harada | 1983-02-01 |
| 4362830 | Hindered bis-phenol phenyl phosphites and synthetic resin compositions having enhanced stability to heat and light | Yutaka Nakahara | 1982-12-07 |
| 4348308 | Ortho-substituted aryl phosphite additive composition | Yutaka Nakahara, Kazumi Kitsukawa | 1982-09-07 |
| 4346025 | Stabilized vinyl chloride polymer comprising a phenylethylidene aryl phosphite | William E. Leistner, Yutaka Nakahara, Kazumi Kitsukawa | 1982-08-24 |
| 4321191 | Stabilized composition comprising a dihydric alcohol thiodipropionic acid ester | Yutaka Nakahara, Tohru Haruna | 1982-03-23 |
| 4312804 | 2,2,6,6-Tetraalkyl-4-piperidyl alcohol esters of tetradecylene polycarboxylic acids as light stabilizers for synthetic polymers | Naohiro Kubota, Toshihiro Shibata | 1982-01-26 |
| 4298520 | Phenolic ester synthetic resin stabilizers | Yutaka Nakahara, Masayuki Takahashi | 1981-11-03 |
| 4293472 | Stabilized synthetic resin composition | Yutaka Nakahara, Tohru Haruna | 1981-10-06 |
| 4282141 | Ortho-substituted phenyl phosphite additive composition | Yutaka Nakahara, Kazumi Kitsukawa | 1981-08-04 |
| 4257927 | Inorganic organic coester stabilizers | William E. Leistner, Yutaka Nakahara, Tohru Haruna | 1981-03-24 |
| 4255301 | Glycol carbonate ester stabilizers for synthetic resins | Yutaka Nakahara, Naohiro Kubota | 1981-03-10 |
| 4244848 | Halogen containing resin composition | Tetsuo Sekiguchi, Kenji Nakazawa | 1981-01-13 |
| 4243581 | Stabilized polypropylene composition | Mitsuo Akutsu, Hiroshi Fujiwara, Masayuki Kashiki | 1981-01-06 |
| 4239803 | Ethylene polymer composition | Toshio Ohzeki, Mitsuo Akutsu, Yutaka Nakahara, Tohru Haruna, Masahiro Nonoyama | 1980-12-16 |
| 4233414 | Polyhydric phenol coester stabilizers | William E. Leistner, Yutaka Nakahara, Tohru Haruna | 1980-11-11 |
| 4225474 | Organophosphonate coester stabilizers | Yutaka Nakahara, Masayuki Takahashi | 1980-09-30 |
| 4224203 | Vinyl chloride polymer stabilizer comprising a metal organophosphonate | Tetsuo Sekiguchi, Naoyasu Kurita, Yuji Sugawara | 1980-09-23 |
| 4224218 | Stabilized vinyl chloride polymer comprising a metal mono-organic phosphite | Tetsuo Sekiguchi, Naoyasu Kurita, Yuji Sugawara | 1980-09-23 |
| 4222931 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl ether alcohol or ether, phosphonic acid ester and phenolic antioxidant | Yutaka Nakahara, Naohiro Kubota, Toshihiro Shibata | 1980-09-16 |
| 4221687 | Anti-yellowing composition | Tetsuo Sekiguchi, Kenji Nakazawa | 1980-09-09 |
| 4219463 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester, .beta.-thioalkyl propionic acid ester and phenol | Naohiro Kubota, Tohru Haruna, Toshihiro Shibata | 1980-08-26 |
| 4217258 | Stabilized halogen-containing resin composition | Tetsuo Sekiguchi, Kenji Nakazawa | 1980-08-12 |
| 4210577 | Stabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester, phosphonic acid ester and phenol | Yutaka Nakahara, Naohiro Kubota, Toshihiro Shibata | 1980-07-01 |