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. 05, 2003
Filed:
Jul. 02, 2001
Applicant:
Inventors:
Martin U. Schmidt, Frankfurt am Main, DE;
Arpad Acs, Oberursel, DE;
Rüdiger Jung, Kelkheim, DE;
Franz Schui, Frankfurt am Main, DE;
Assignee:
Clariant GmbH, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 2/946 ;
U.S. Cl.
CPC ...
C09B 2/946 ;
Abstract
C.I. Pigment Yellow 191 is obtained in new crystal polymorphs (beta, gamma, delta and epsilon phases) if the known alpha phase or another inventive phase of this pigment is treated with certain solvents and reprecipitated.