Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6455731 | Process for producing a high purity aromatic polycarboxylic acid | Ryusuke Shigematsu, Shinichi Nagao, Jitsuo Oishi, Akio Hashimoto | 2002-09-24 |
| 6452047 | Process for producing highly pure aromatic polycarboxylic acid | Ryusuke Shigematsu, Akio Hashimoto, Makoto Takagawa | 2002-09-17 |