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:
Dec. 25, 1979
Filed:
Mar. 04, 1977
Applicant:
Inventor:
William R Lawton, Orchard Park, NY (US);
Assignee:
Graphic Controls Corporation, Buffalo, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
106 145 ; 106 21 ; 106 22 ; 282 275 ; 427148 ; 427150 ; 428411 ;
Abstract
A heat sensitive recording member capable of acquiring a stable color in selected regions contrasting with the background color of the coated substrate upon exposing these regions to an elevated temperature and comprising a paper or polymeric film substrate and a heat sensitive coating comprising (1) an adduct or mixture of color-forming lactones or spiropyrans with a cyclic polyketo color precursor, (2) a polymeric binder which bonds the reactants to the substrate and optionally (3) a molecular complex between a phenolic compound and an amine and/or an activator to lower the temperature of color formation.