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. 04, 1984
Filed:
Jul. 11, 1983
Applicant:
Inventor:
James B Ganci, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
106309 ; 1062 / ; 26024587 ;
Abstract
A process of reducing the particle size of oversize crude quinacridones to pigmentary grade material by ball or rod milling the crude quinacridone with 3-10 parts per part by weight pigment of borax pentahydrate and 5-40% by weight, based on pigment, of a monohydric alcohol containing 4-8 carbon atoms of a polyethylene glycol having a molecular weight of 150-600.