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:
Jan. 17, 1984
Filed:
Aug. 12, 1982
Applicant:
Inventor:
Wilfried G Holtje, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
1062 / ; 1063 / ; 546 10 ;
Abstract
Quinacridonequinone pigments photostabilized with from 2.5 to 20 wt. % Mn(OH).sub.2 are disclosed. The Mn(OH).sub.2 is precipitated on the pigment from an aqueous solution of a divalent manganese salt by either adding a base or adding urea to the salt solution and heating.
Holtje, Wilfried. (1984). Light stable quinacridonequinone pigments (U.S. Patent No. 4426231). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4426231
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile