Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7319165 | Aminopolycarboxylic acid aqueous solution composition and stabilization method of aminopolycarboxlic acid | Yasutaka Sumida | 2008-01-15 |
| 6504054 | Amino acid derivative and producing method thereof | Yasutaka Sumida, Tomomi Ina | 2003-01-07 |
| 6294693 | Production process for ether carboxylate salt | Miaki Asakawa, Yasutaka Sumida | 2001-09-25 |
| 5801277 | Solid catalyst for etherification reaction and production process for ether compound using this catalyst | Yasutaka Sumida, Miaki Asakawa, Yuichi Kita, Yoshiyuki Takahashi, Kazuo Sagi | 1998-09-01 |