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:
May. 15, 1984
Filed:
Dec. 23, 1982
Applicant:
Inventor:
Robert J Flores, Cincinnati, OH (US);
Assignee:
The Sherwin-Williams Company, Cleveland, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
346224 ; 427150 ; 4284111 ; 428914 ; 260391 ;
Abstract
Triphenylmethane dyes are obtained in a purified or more concentrated condition which eliminates the excess aromatic amines and by-products obtained during the synthesis of the triphenylmethane dyes. These purified triphenylmethane dyes show special utility when used in combination with an electron acceptor (Lewis acid) to produce carbonless copy paper or when used as reactants in the manufacture of other dyes.
Flores, Robert. (1984). Process for the purification of triphenylmethane compounds and pressure (U.S. Patent No. 4448446). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4448446
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile