Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5270090 | Semiconductor device coated with a fluorena-containing polyiimide and a process of preparing | Tsutomu Kobayashi, Motonobu Kubo | 1993-12-14 |
| 5264598 | Fluorine-containing aromatic compound, process for preparing the same and use thereof | Tsutomu Kobayashi, Motonobu Kubo | 1993-11-23 |
| 5166365 | Fluorine-containing aromatic compound, process for preparing the same and use thereof | Tsutomu Kobayashhi, Motonobu Kubo | 1992-11-24 |
| 4973742 | Halogen-containing polyether | Takashi Tohzuka, Shoji Takaki | 1990-11-27 |
| 4946935 | Fluorine-containing aromatic compound, process for preparing the same and use thereof | Tsutomu Kobayashi, Motonobu Kubo | 1990-08-07 |
| 4946972 | Process for distillation of 2,2,3,3-tetrafluorooxetane | Shoji Takaki | 1990-08-07 |
| 4908460 | Process for purification of 2,2,3,3-tetrafluorooxetane | Shoji Takaki | 1990-03-13 |
| 4904417 | Fluorine-containing polyether and process for preparing the same | Takashi Tohzuka, Yoshitaka Honda, Norio Yanagisawa | 1990-02-27 |
| 4886581 | Removal of hydrogen fluoride from 2,2,3,3-tetra-fluorooxetane | Shoji Takaki, Hiroo Sakai | 1989-12-12 |
| 4864040 | Monohalogenotrifluorooxetane and its preparation | Satoru Kohno | 1989-09-05 |
| 4845268 | Halogen-containing polyether | Takashi Tohzuka, Shoji Takaki | 1989-07-04 |
| 4825014 | Process for preparing chlorotrifluoromethylbenzene | Heikitsu Sonoyama | 1989-04-25 |
| 4739059 | Fluorine-containing amine amides | Yoshio Amimoto, Yoshio Negishi | 1988-04-19 |
| 4719052 | 2,2-difluoropropionic acid derivatives | Takashi Tohzuka, Shoji Takaki, Yoshio Negishi, Satoru Kohno | 1988-01-12 |
| 4709060 | Substituted trifluorooxetanes | Shoji Takaki | 1987-11-24 |
| 4683289 | Novel fluorine-containing polyaminoamide and preparation thereof from fluorooxetane and polyamine | Yoshio Amimoto, Yoshio Negishi | 1987-07-28 |
| 4400563 | Process for preparing perfluoro(lower)alkylbenzenes and their derivatives | Uji Hiramatsu, Toshihide Honda | 1983-08-23 |
| 4367350 | Process for preparing perfluoro(lower)alkyl-benzenes and their derivatives | Uji Hiramatsu, Toshihide Honda | 1983-01-04 |
| 4296265 | Process for preparing hexafluoropropene oligomers | Takashi Tohzuka | 1981-10-20 |
| 4288376 | Process for preparing hexafluoropropene oxide | Takashi Tohzuka | 1981-09-08 |
| 4284822 | Process for preparing hexafluoroacetone | Takashi Tohzuka | 1981-08-18 |
| 4242286 | Process for preparing benzotrifluoride and its derivatives | — | 1980-12-30 |
| 4238416 | Method for isomerization of fluorinated epoxy compounds | Takashi Tohzuka | 1980-12-09 |