Issued Patents All Time
Showing 201–225 of 254 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937316 | Process for preparing polyimides | Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Shoji Tamai, Hideaki Oikawa | 1990-06-26 |
| 4931531 | Polyimide and high-temperature adhesive thereof | Shoji Tamai, Masahiro Ohta, Saburo Kawashima, Katsuaki Iiyama, Hideaki Oikawa | 1990-06-05 |
| 4918216 | Preparation process of .alpha.-l-aspartyl-l-phenyl-alanine methyl ester or hydrohalide thereof | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Takeshi Oura | 1990-04-17 |
| 4908409 | Polyimide | Hideaki Oikawa, Katsuaki Liyama, Nobuhito Koga, Saburo Kawashima, Shoji Tamai +1 more | 1990-03-13 |
| 4897506 | Isolation of alpha-l-aspartyl-l-phenylalanine methyl ester from aqueous medium | Ryuichi Mita, Takeshi Oura, Toshio Katoh, Chojiro Higuchi, Masanobu Ajioka | 1990-01-30 |
| 4883718 | Flexible copper-clad circuit substrate | Masahiro Ohta, Saburo Kawashima, Yoshiho Snobe, Shoji Tamai, Hideaki Oikawa | 1989-11-28 |
| 4865795 | Process for producing thermosetting resins | Tetsunosuke Shiomura, Yoshiho Sonobe | 1989-09-12 |
| 4847349 | Polyimide and high-temperature adhesive of polyimide from meta substituted phenoxy diamines | Masahiro Ohta, Saburo Kawashima, Yoshiho Sonobe, Shoji Tamai, Hideaki Oikawa +1 more | 1989-07-11 |
| 4839232 | Flexible laminate printed-circuit board and methods of making same | Moritsugu Morita, Kazuo Miyazaki, Masahiro Ohta, Shoji Tamai, Kunio Nishihara | 1989-06-13 |
| 4831102 | Thermosetting resin composition from poly-arylene-oxy-bis-maleimide and polyarylene diamine | Norimasa Yamaya, Nobuhito Koga, Masahiro Ohta | 1989-05-16 |
| 4808507 | Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based | Yasuyuki Yamada, Hisato Itoh, Tsutomu Nishizawa | 1989-02-28 |
| 4808503 | Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide | Yasuyuki Yamada, Hisato Itoh, Tsutomu Nishizawa | 1989-02-28 |
| 4803258 | Thermoplastic aromatic polyether-pyridine and process for preparing same | Keizaburo Yamaguchi, Hideaki Oikawa, Kenichi Sugimoto, Masahiro Ohta | 1989-02-07 |
| 4801732 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester | Ryuichi Mita, Takeshi Oura, Chojiro Higuchi, Toshio Katoh | 1989-01-31 |
| 4797466 | High-temperature adhesive polyimide from 2,6-bis(3-aminophenoxy)pyridine | Hideaki Oikawa, Masahiro Ohta, Saburo Kawashima, Shoji Tamai, Yoshiho Sonobe | 1989-01-10 |
| 4795798 | High-temperature adhesive polyimide from 2,2-bis[4-(3-amino phenoxy)phenyl]1,1,1,3,3,3-hexafluoro propane | Shoji Tamai, Saburo Kawashima, Masahiro Ohta, Hideaki Oikawa, Kouji Ohkoshi | 1989-01-03 |
| 4785069 | Preparation process of heat-resistant polymers from polycarboxylic acids or anhydrides in the presence of an alkali metal fluoride and quaternary onium salt | Masahiro Kouno, Masanori Osawa, Kohei Shizuka, Hiromi Nakano, Kazumi Mizutani | 1988-11-15 |
| 4783521 | Linear salicylic acid copolymers and their metal salts, production process thereof, color-developing agents comprising metal-resins of the copolymers | Keizaburo Yamaguchi, Yoshimitsu Tanabe, Makoto Asano, Masaru Wada | 1988-11-08 |
| 4780561 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Takeshi Oura, Toshio Katoh, Chojiro Higuchi | 1988-10-25 |
| 4778916 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Takeshi Oura | 1988-10-18 |
| 4769463 | 2,6-bis(aminophenoxy)pyridine and method of preparing the same | Keizaburo Yamaguchi, Kenichi Sugimoto, Yukihiro Yoshikawa, Yoshimitsu Tanabe | 1988-09-06 |
| 4754068 | 1,3-bis(3-aminophenoxy)-5-halogenobenzenes and process for their preparation | Keizaburo Yamaguchi, Yukihiro Yoshikawa, Yoshimitsu Tanabe, Kenichi Sugimoto | 1988-06-28 |
| 4751328 | Process for producing aminobenzylamines | Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Midori Yamazaki | 1988-06-14 |
| 4745210 | Preparation process of N-formyl-.alpha.-aspartyl phenylalanine | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Takeshi Oura | 1988-05-17 |
| 4736008 | Preparation process of heat-resistant polymers from polycarboxcylic acids and anhydrides in the presence of an alkali metal fluoride | Masahiro Kouno, Masanori Osawa, Kohei Shizuka, Hiromi Nakano, Kazumi Mizutani | 1988-04-05 |