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:
Mar. 06, 1979
Filed:
Jan. 31, 1977
Ernest A Stefancsik, Flemington, NJ (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Preparation of Aqueous-Stable Metalized Azo Pigment from 5-amino or 4-amino-2-chloro-toluene-5-sulfonic Acid and 3-hydroxy-2-naphthoic Acid with Calcium and Strontium Salts by diazotizing one of 2-chloro-5-amino-toluene-4-sulfonic acid and 2-chloro-4-amino-toluene-5-sulfonic acid, contacting the diazo with an inorganic salt of calcium, coupling the diazo with 3-hydroxy-2-naphthoic acid, and contacting the coupled diazo with an inorganic salt of strontium. The resulting metalized azo pigment exhibits high stability in aqueous coating compositions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile