Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659036 | Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate | Shigeki Kato, Yoshimi Kikuchi | 1997-08-19 |
| 5622555 | Process for the production of dis-azo pigment | Yoshio Muramatsu, Ataru Chiba | 1997-04-22 |
| 5610306 | Process for the production of 6,13-dihydroquinacridones and apparatus for use for the production | Shigeki Kato, Shinichi Azuma, Mikio Hayashi, Masatoshi Momose | 1997-03-11 |