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. 02, 2008
Filed:
Jul. 18, 2006
Yingxia He, Wilmington, DE (US);
Colin Dennis Campbell, Claymont, DE (US);
Gordian Schilling, Klettgau, DE;
Rhonda Carter, Bear, DE (US);
Melissa Wagner, Jefferson, OH (US);
James Thomas Will, Bear, DE (US);
Kevin Rodney Gerzevske, Wilmington, DE (US);
Yingxia He, Wilmington, DE (US);
Colin Dennis Campbell, Claymont, DE (US);
Gordian Schilling, Klettgau, DE;
Rhonda Carter, Bear, DE (US);
Melissa Wagner, Jefferson, OH (US);
James Thomas Will, Bear, DE (US);
Kevin Rodney Gerzevske, Wilmington, DE (US);
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The invention is directed to a method or use of 2,9-dichloro-quinacridone as an alpha crystal phase inhibitor and optionally, 4,11-dichloroquinacridone during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. The invention is also directed to solid solutions of quinacridone comprising about 98 to about 80 weight % gamma or beta-quinacridone, about 0.1 to about 10 weight % 2,9-dichloroquinacridone and about 0.1 to about 10 weight % 4,11-dichloroquinacridone.