Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8455637 | Process for adjusting degree of acetyl substitution of cellulose acetate | Tohru Shibata, Yuichiro Shuto, Masaaki Ito | 2013-06-04 |
| 7671193 | Method for adjusting the degree of substitution with acetyl group of cellulose acetate | Tohru Shibata, Yuichiro Shuto, Masaaki Ito | 2010-03-02 |
| 6344239 | Method for producing a tobacco filter material | Syu Shimamoto, Hiroyuki Matsumura, Tohru Shibata | 2002-02-05 |
| 5977346 | Fatty acid ester of cellulose, cellulose diacetate and processes for the preparation thereof | Shiro Saka, Hiroyuki Matsumura, Naoto Habu, Yoshiaki Kaino, Ryouta Iwata +1 more | 1999-11-02 |
| 5856006 | Tobacco filter material and a method for producing the same | Syu Shimamoto, Hiroyuki Matsumura, Tohru Shibata | 1999-01-05 |