The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1994
Filed:
Jul. 30, 1992
Applicant:
Inventors:
Hiroki Inoue, Osaka, JP;
Toshiaki Kishimoto, Osaka, JP;
Iwao Sakaguchi, Hyogo, JP;
Kunitoshi Takahashi, Hyogo, JP;
Yoshiaki Hayashi, Osaka, JP;
Keisuke Ito, Osaka, JP;
Assignee:
Sumitomo Chemical Co. Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
106498 ; 544100 ; 106493 ;
Abstract
A desulfonation reaction mixture of 4,4'-diamino-1,1'-dianthraquinonyl-3,3'-disulfonic acid obtainable in a conventional manner is mixed in the form of an aqueous acid suspension with a surface active agent, followed by filtration, whereby filterability and flowability of the produced 4,4'-diamino-1,1'-dianthraquinonyl pigment are efficiently improved.
Inoue, Hiroki. (1994). Process for producing 4,4'-diamino-1,1,'-dianthraquinonyl pigments (U.S. Patent No. 5320678). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5320678
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile