Issued Patents All Time
Showing 176–200 of 254 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5043419 | Process for preparing a polyimide and a composite material containing the same | Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Hideaki Oikawa, Tomohito Koba +5 more | 1991-08-27 |
| 5041520 | Process for preparing polyimide having excellent high temperature stability | Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Shoji Tamai, Hideaki Oikawa | 1991-08-20 |
| 5028641 | Thermosetting resin composition | Norimasa Yamaya, Masahiro Ohta | 1991-07-02 |
| 5028581 | Odorless multi-valent metal modified products of salicyclic acid copolymers, production processes thereof, and use thereof as color-developing agents for pressure-sensitive copying paper sheets | Keizaburo Yamaguchi, Yoshimitsu Tanabe | 1991-07-02 |
| 5023366 | Salicylic acid copolymers and their metal salts, production process thereof, color-developing agents comprising metal salts of the copolymers, and color-developing sheets employing the agents | Keizaburo Yamaguchi, Yoshimitsu Tanabe, Makoto Asano | 1991-06-11 |
| 5023343 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Hisato Itoh, Masakatsu Nakatsuka | 1991-06-11 |
| 5013848 | Aromatic bismaleimide derivatives and process for preparing same | Yukihiro Yoshikawa, Midori Yamazaki, Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe | 1991-05-07 |
| 5013817 | Process for preparing a polyimide and a composite material containing the same | Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Hideaki Oikawa, Tomohito Koba +5 more | 1991-05-07 |
| 5010161 | Polyaldimine derivatives | Masaaki Aoki, Masayuki Kamiyama, Kiyotsugu Asai | 1991-04-23 |
| 4997874 | Aqueous suspension and preparation method thereof | Makoto Asano, Kiyoharu Hasegawa, Masatoshi Takagi, Keizaburo Yamaguchi, Yoshimitsu Tanabe +1 more | 1991-03-05 |
| 4987261 | Diaminoindane derivatives | Keizaburo Yamaguchi, Masayuki Ooe | 1991-01-22 |
| 4987207 | Thermosetting resin compositions | Norimasa Yamaya, Masahiro Ohta | 1991-01-22 |
| 4987197 | Polyimide/polyamideimide resin composition | Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Shoji Tamai, Hideaki Oikawa | 1991-01-22 |
| 4978792 | Process for producing aminobenzylamine | Teruyuki Nagata, Akihiro Tamaki, Katsuzi Watanabe | 1990-12-18 |
| 4968762 | Thermosetting-resin-forming composition from bis-maleimide and diallyl bis phenol | Norimasa Yamaya, Masahiro Ohta | 1990-11-06 |
| 4966961 | Polymaleimide from polyarylene polyamine and process for the preparation thereof | Yoshimitsu Tanabe, Keizaburo Yamaguchi, Tatsuhiro Urakami | 1990-10-30 |
| 4963449 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Hisato Itoh, Masakatsu Nakatsuka | 1990-10-16 |
| 4962222 | Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl ester having low hygroscopicity | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Takeshi Oura | 1990-10-09 |
| 4960852 | Thermosetting resin compostion from bis, maleimide and bis (meta-amino phenoxy) compound | Norimasa Yamaya, Nobuhito Koga, Masahiro Ohta | 1990-10-02 |
| 4959443 | Thermosetting resin composition from bis maleimide and aromatic amine resin | Norimasa Yamaya, Masahiro Ohta | 1990-09-25 |
| 4959440 | Polymide for high-temperature adhesive | Shoji Tamai, Saburo Kawashima, Yoshiho Sonobe, Masahiro Ohta, Hideaki Oikawa | 1990-09-25 |
| 4957994 | Epoxy resins containing imido rings, production process thereof and epoxy resin compositions containing the same | Tatsuhiro Urakami, Yoshimitsu Tanabe, Keizaburo Yamaguchi | 1990-09-18 |
| 4952648 | Production process of multivalent metal-modified salicylic acid/styrene resin, color-developing agent using the resin and suited for use in pressure-sensitive copying paper sheet and pressure-sensitive copying paper unit employing the agent | Keizaburo Yamaguchi, Yoshimitsu Tanabe | 1990-08-28 |
| 4937318 | Aromatic amine resins | Keizaburo Yamaguchi, Yoshimitsu Tanabe, Tatsuhiro Urakami, Norimasa Yamaya, Masahiro Ohta | 1990-06-26 |
| 4937339 | Process for preparing isocyanurate ring-containing materials | Tetsunosuke Shiomura, Yoshiho Sonobe, Ryuzi Haseyama | 1990-06-26 |