Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5049604 | Process for producing piperidine derivative and stabilized resin composition containing said derivative | Takeo Fujii, Tamaki Ishii, Shinichi Yachigo, Yukoh Takahashi, Yuzo Maegawa +2 more | 1991-09-17 |
| 4851551 | Ultraviolet ray absorbing agent | Haruki Okamura | 1989-07-25 |
| 4774274 | Thermally stabilized butadiene resins containing a hindered phenolic acrylate or methacrylate | Takeshi Takata, Shin-ichi Yachigo, Haruki Okamura, Yukoh Takahashi | 1988-09-27 |
| 4745195 | Ultraviolet ray absorbing agent | Haruki Okamura | 1988-05-17 |
| 4719037 | Piperidine derivatives, production process therefor, and stabilizers for organic substances containing said derivatives as an active component | Yukoh Takahashi, Yuzo Maegawa, Hiroki Yamamoto, Haruki Okamura, Shinichi Yachigo +1 more | 1988-01-12 |
| 4695407 | Method for purifying 1-aminoanthraquinone | Norio Kotera, Masatoshi Uegaki, Masakatsu Yoshimura, Shinzaburo Masaki, Takashi Miyaoka +2 more | 1987-09-22 |
| 4670488 | Piperidine derivatives, their production and use as stabilizers | Yuzo Maegawa, Yukoh Takahashi, Eizo Okino, Haruki Okamura, Shinichi Yachigo +1 more | 1987-06-02 |
| 4670489 | Piperidine derivatives, their production and use as stabilizers | Yukoh Takahashi, Eizo Okino, Yuzo Maegawa, Haruki Okamura, Shinichi Yachigo +1 more | 1987-06-02 |
| 4612394 | Process for producing aminophenyl-.beta.-hydroxyethylsulfone | Norio Kotera, Kazuhiro Tada, Shinzaburo Masaki, Kunihisa Goto | 1986-09-16 |
| 4407756 | Process for producing aminoanthraquinone | Akira Fukasawa, Masakatsu Yoshimura, Kenji Takahashi | 1983-10-04 |