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:
Oct. 15, 2013
Filed:
Aug. 27, 2012
Brian Thompson, Goose Creek, SC (US);
Daphne Rice, Charleston, SC (US);
Tracie Tibbs, Charleston, SC (US);
Wengan Wu, Mt. Pleasant, SC (US);
John Britanak, Summerville, SC (US);
Edward H. Sung, Cincinnati, OH (US);
Brian Thompson, Goose Creek, SC (US);
Daphne Rice, Charleston, SC (US);
Tracie Tibbs, Charleston, SC (US);
Wengan Wu, Mt. Pleasant, SC (US);
John Britanak, Summerville, SC (US);
Edward H. Sung, Cincinnati, OH (US);
Sun Chemical Corporation, Parsippany, NJ (US);
Abstract
2,5-di(p-methoxyanilino)terephthalic acid crystal types I and II are made by controlling the pH during the recovery of the oxidized product of the condensation of dimethylsuccinyl succinate with p-methoxyaniline. The resulting 2,5-di(p-methoxyanilino)-terephthalic acid can be converted into 2,9-dimethoxyquinacridone or a solid solution thereof having controlled characteristics.