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:
Sep. 15, 1998
Filed:
Jul. 22, 1997
Applicant:
Inventors:
Jin Mizuguchi, Yokohama, JP;
Zhimin Hao, Marly, CH;
Olof Wallquist, Marly, CH;
Abul Iqbal, Arconciel, CH;
Assignee:
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
548453 ; 548454 ; 548465 ; 548466 ; 548467 ; 548515 ; 544242 ; 544333 ; 544335 ; 546251 ; 5462767 ; 5462784 ; 549-1 ; 549 29 ; 549 59 ; 549 74 ; 549 78 ; 549200 ; 549491 ; 549497 ; 10628721 ; 106401 ; 106496 ; 106498 ;
Abstract
A process for the preparation of mixed crystals of 1,4-diketopyrrolo�3,4-c!pyrroles, consisting of 1 mol each of two different compounds of formula ##STR1## by heating a corresponding mixture in solid form to the temperature range from 220.degree. to 380.degree. C.