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:
May. 11, 1982
Filed:
Dec. 15, 1980
Applicant:
Inventors:
Peter Eugster, Arlesheim, CH;
Stefan Koller, Ramlinsburg, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06P / ;
U.S. Cl.
CPC ...
8526 ; 8662 ; 2602075 ; 260208 ;
Abstract
By suspension of the melt of the known crystallographically amorphous dye of the formula ##STR1## which is unstable to dyeing, in water at a temperature of 90.degree. to 130.degree. C., this dye can be caused to crystallize. There is obtained a crystalline granulate in which the dye is completely in the novel .epsilon.-modification. The novel dye modification is stable in dispersion under dyeing conditions, and has no tendency to flocculate.