Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189209 | Process for producing highly pure isophthalic acid | Kazuo Tanaka, Fumio Ohgoshi, Terumasa Yoshida, Ichihei Motoyama | 1993-02-23 |
| 5132450 | Process for producing high purity isophthalic acid | Kazuo Tanaka, Terumasa Yoshida, Fumio Okoshi, Ichihei Motoyama, Toshiaki Abe | 1992-07-21 |
| 4297507 | Process and apparatus for producing terephthalic acid with high purity | Makoto Komatsu, Yuji Takamizawa | 1981-10-27 |
| 4268690 | Process for producing terephthalic acid of high purity | Makoto Komatsu, Toru Tanaka, Ryoichi Oda, Yuji Takamizawa | 1981-05-19 |
| 4214100 | Process for preventing blackening of phthalic acid | Makoto Komatsu, Toru Tanaka, Kimiko Akagi | 1980-07-22 |
| 4211882 | Process for producing terephthalic acid | Makoto Komatsu, Toru Tanaka, Kimiko Akagi | 1980-07-08 |