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:
Aug. 25, 1987
Filed:
Nov. 08, 1985
Applicant:
Inventors:
Ernst Spietschka, Idstein/Taunus, DE;
Manfred Urban, Wiesbaden, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
106309 ; 548459 ;
Abstract
A process for the preparation of 4,4',7,7'-tetrachloro-thioindigo pigment which comprises treating a finely divided crude 4,4',7,7'-tetrachloro-thioindigo pigment in anhydrous form at temperatures of from 50.degree. to 180.degree. C. with a nitroaromatic substance which is volatile in steam and has a melting point of 50.degree. C. or below under normal conditions.
Quick Actions:
Spietschka, Ernst. (1987). Process for the preparation of an organic pigment on the basis of (U.S. Patent No. 4689087). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4689087
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile