Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8851297 | Composite semipermeable membrane and process for producing the same | Atsuhito Koumoto | 2014-10-07 |
| 8518310 | Process for producing a dried composite semipermeable membrane | Atsuhito Koumoto, Takashi Kamada | 2013-08-27 |
| 7081202 | Composite semipermeable membrane, production method thereof, and water treatment method using the same | Masahiko Hirose, Naoki Kurata | 2006-07-25 |
| 6723422 | Composite reverse osmosis membrane and process for preparing the same | Masahiko Hirose, Hiroki Ito | 2004-04-20 |
| 6533937 | Methods of running and washing spiral wound membrane modules | Tetsurou Adachi, Masaaki Andou, Hajimu Hisada, Toshiyuki Kawashima, Ichirou Kawada | 2003-03-18 |
| 6432310 | Methods of running and washing spiral wound membrane module | Masaaki Andou, Hajimu Hisada, Ichirou Kawada | 2002-08-13 |
| 6171497 | Highly permeable composite reverse osmosis membrane | Masahiko Hirose, Masaaki Ando | 2001-01-09 |
| 6024873 | Highly permeable composite reverse osmosis membrane and a reverse osmosis membrane module using the same | Masahiko Hirose, Hiroki Ito | 2000-02-15 |
| 5750633 | Dope for cast formation and method of manufacturing the same | Hisao Hachisuka | 1998-05-12 |
| 5733602 | Method for producing highly permeable composite reverse osmosis membrane | Masahiko Hirose, Hiroki Ito | 1998-03-31 |
| 5690870 | Method of manufacturing a polyimide-type gas permeation membrane including fluorine | Hisao Hachisuka, Ping Xu | 1997-11-25 |
| 5647894 | Gas separating composite membrane and process for producing the same | Hisao Hachisuka, Ping Xu, Akira Shimazu, Kenichi Ikeda | 1997-07-15 |