Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464755 | Gas separation membrane and method for its use | Shunsuke Nakanishi, Toshimune Yoshinaga, Kenji Ito | 2002-10-15 |
| 6395066 | Partially carbonized asymmetric hollow fiber separation membrane, process for its production, and gas separation method | Nozomu Tanihara | 2002-05-28 |
| 6210464 | Mixed gas-separating membrane module and process | Shunsuke Nakanishi, Masao Kikuchi, Tatsuo Yamamoto, Mitsuo Maeda | 2001-04-03 |
| 5744575 | Aromatic polyimide and gas separation | Shunsuke Nakanishi, Kenji Ito | 1998-04-28 |
| 5286539 | Gas separating asymmetric membrane | Toshimune Yoshinaga, Harutoshi Hoshino, Shinji Asanuma | 1994-02-15 |
| 5246743 | Method of enhancing gas separation performance of an aromatic polyimide membrane | Shunsuke Nakanishi | 1993-09-21 |
| 5141642 | Aromatic polyimide double layered hollow filamentary membrane and process for producing same | Toshimune Yoshinaga, Hiroshi Shimazaki | 1992-08-25 |
| 5064446 | Method of preparing high purity light gas by multiple-step gas separation | Kazuhiko Ishihara | 1991-11-12 |
| 4997462 | Pervaporation method of selectively separating water from an organic material aqueous solution through aromatic imide polymer asymmetric membrane | Masayuki Nakatani, Yoshiyuki Sumiyama | 1991-03-05 |
| 4959151 | Pervaporation method of separating liquid organic compound mixture through aromatic imide polymer asymmetric membrane | Masayuki Nakatani, Makoto Matsuo | 1990-09-25 |
| 4938902 | Process for producing aromatic imide polymer hollow filaments | Asumaru Nakamura, Takashi Harada | 1990-07-03 |
| 4830640 | Aromatic imide polymer hollow filaments | Asumaru Nakamura, Takashi Harada | 1989-05-16 |
| 4654910 | Spun yarn piling and cleaning method | Masao Kikuchi, Yoshio Takeuchi | 1987-04-07 |
| 4528004 | Aromatic polyimide composite separating membrane | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1985-07-09 |
| 4512893 | Porous aromatic imide polymer membrane and a process for its manufacture | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1985-04-23 |
| 4486376 | Process for modifying porous polymeric membrane | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1984-12-04 |
| 4485056 | Production of aromatic polyimide separating membranes | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1984-11-27 |
| 4474858 | Aromatic polyimide gas-separating membrane | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1984-10-02 |
| 4474662 | Process for producing porous aromatic polyimide membranes | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1984-10-02 |
| 4460526 | Process for producing aromatic polyimide hollow filaments | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki | 1984-07-17 |
| 4440643 | Process for producing aromatic polyimide composite separating membrane | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki, Tosio Isida | 1984-04-03 |
| 4378324 | Process for preparing aromatic polyimide semipermeable membranes | Hiroshi Makino, Hiroshi Yoshida, Asumaru Nakamura | 1983-03-29 |
| 4378400 | Gas separating material | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki | 1983-03-29 |
| 4370290 | Process for producing aromatic polyimide filaments | Hiroshi Makino, Takashi Harada, Hiroshi Shimazaki | 1983-01-25 |