Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5567842 | Process for producing terephthalic acid | Tukasa Kawahara, Akihiko Toyosawa | 1996-10-22 |
| 5557009 | Process for preparing an aqueous slurry of terephthalic acid | Yoshiyuki Sumi, Takayuki Isogai | 1996-09-17 |
| 5420344 | Process for producing highly pure terephthalic acid | Tsukasa Kawahara, Yoshiyuki Sumi, Takehiko Baba, Yoshio Ishinaga, Katsuhiko Fukui +1 more | 1995-05-30 |
| 4877900 | Process for preparing terephthalic acid of high quality | Akio Tamaru | 1989-10-31 |
| 4772748 | Process for producing highly pure terephthalic acid | Hiroshi Hashizume | 1988-09-20 |
| 4599465 | Process for producing orthoalkylphenols | Akio Tamaru, Hidekichi Hashimoto, Kiyoji Kuma, Takashi KOMAYA, Masanobu Minagawa | 1986-07-08 |
| 4593122 | Process for preparing terephthalic acid by the catalytic oxidation with air of p-xylene in a water containing acetic acid solvent | Hiroshi Hashizume | 1986-06-03 |
| 4562285 | Process for producing terephthalic acid | Hiroshi Hashizume | 1985-12-31 |
| 4560793 | Process for producing terephthalic acid | Hiroshi Hashizume | 1985-12-24 |
| 4329493 | Process for producing terephthalic acid | Hiroshi Hashizume | 1982-05-11 |
| 4197412 | Process for preparing terephthalic acid | Tsuneo Kimura, Hiroshi Hashizume | 1980-04-08 |