Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6627170 | Process for preparing calcium carbonate | Kazuto Takahashi, Kiyoshi Kanai, Yasuhiro Okamoto | 2003-09-30 |
| 6585880 | Method for recovering chemicals in a process of producing pulp by kraft process | Keigo Watanabe, Kazuaki Sakai, Tatsuya Andoh, Makoto Nakao | 2003-07-01 |
| 6517699 | Method for producing polysulfides by means of electrolytic oxidation | Tetsuji Shimohira, Tatsuya Andoh, Junji Tanaka, Keigo Watanabe | 2003-02-11 |