Issued Patents All Time
Showing 1–25 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11643476 | Cellulose ester and molded article thereof | Tomohiro HASHIZUME, Hiroyuki Matsumura, Hiroshi Koyama, Mitsuru Ohno, Tomoichi Watabe | 2023-05-09 |
| 10926230 | Semipermeable membrane | Tomohiro HASHIZUME, Hiroyuki Matsumura, Mitsuru Ohno | 2021-02-23 |
| 10927190 | Cellulose ester and molded article thereof | Tomohiro HASHIZUME, Hiroyuki Matsumura, Hiroshi Koyama, Mitsuru Ohno, Tomoichi Watabe | 2021-02-23 |
| 8455637 | Process for adjusting degree of acetyl substitution of cellulose acetate | Yuichiro Shuto, Masaaki Ito, Tanemi Asai | 2013-06-04 |
| 7671193 | Method for adjusting the degree of substitution with acetyl group of cellulose acetate | Yuichiro Shuto, Masaaki Ito, Tanemi Asai | 2010-03-02 |
| 7302954 | Cigarette filter comprising grape proanthocyanidin | Masato Shigematsu, Shoichi Tokutake, Fumio Yamaguchi, Norikazu Fujii | 2007-12-04 |
| RE38435 | Separating agent | Yoshio Okamoto, Koichi Hatada, Ichiro Okamoto, Hiroyuki Nakamura | 2004-02-24 |
| 6344239 | Method for producing a tobacco filter material | Tanemi Asai, Syu Shimamoto, Hiroyuki Matsumura | 2002-02-05 |
| 5927287 | Tobacco filter material and a tobacco filter as produced using the same | Hiroyuki Matsumura, Syu Shimamoto | 1999-07-27 |
| 5863652 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes | Hiroyuki Matsumura, Syu Shimamoto | 1999-01-26 |
| 5856006 | Tobacco filter material and a method for producing the same | Tanemi Asai, Syu Shimamoto, Hiroyuki Matsumura | 1999-01-05 |
| 5705632 | Process for the preparation of cellulose acetate film | Kazuhiro Shimoda, Masahiko Murayama, Hidekazu Yamazaki, Shu Shimamoto, Hiroyuki Takemoto +1 more | 1998-01-06 |
| 5692527 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes | Hiroyuki Matsumura, Syu Shimamoto | 1997-12-02 |
| 5690126 | Tobacco filter materials and tobacco filter as produced by using the same | Hiroyuki Matsumura | 1997-11-25 |
| 5678577 | Tobacco filter material and a tobacco filter as produced using the same | Hiroyuki Matsumura, Syu Shimamoto | 1997-10-21 |
| 5663310 | Cellulose acetate solution and process for the preparation of the same | Kazuhiro Shimoda, Masahiko Murayama, Hidekazu Yamazaki, Shu Shimamoto, Hiroyuki Takemoto +1 more | 1997-09-02 |
| 5489387 | Separation agent comprising acyl- or carbamoyl-substituted polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1996-02-06 |
| 5472599 | Separation agent comprising aliphatic or aromatic ester of polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1995-12-05 |
| 5415769 | Separation agent comprising aliphatic or aromatic ester of polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1995-05-16 |
| 5415780 | Separation agent comprising acyl- or carbamoyl-substituted polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1995-05-16 |
| 5368737 | Separation agent comprising acyl-or carbamoyl-substituted polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1994-11-29 |
| 5334311 | Separation agent comprising aliphatic or aromatic ester of polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1994-08-02 |
| 5268098 | Separation agent comprising aliphatic or aromatic ester of polysaccharide | Hajime Namikoshi, Ichiro Okamoto | 1993-12-07 |
| RE34457 | Separating agent | Yoshio Okamoto, Koichi Hatada, Ichiro Okamoto, Hiroyuki Nakamura | 1993-11-30 |
| 5229002 | Separation agent comprising acyl- or carbamoyl-substituted polysaccharide | Hajime Nakikoshi, Ichiro Okamoto | 1993-07-20 |