Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6562998 | Granules of 2-hydroxynaphthalene-3-carboxylic acid and method for preparing the same | Ryuzo Ueno, Masaya Kitayama, Nobutaka Izumichi, Masaharu Kittaka | 2003-05-13 |
| 6133475 | Process for producing 2-hydroxynaphthalene-3,6-dicarboxylic acid | Ryuzo Ueno, Masaya Kitayama, Yoshiro Uchiyama | 2000-10-17 |