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. 23, 1990
Filed:
Jan. 17, 1989
Applicant:
Inventors:
Steven L Vervacke, Appleton, WI (US);
Kenneth D Glanz, Appleton, WI (US);
Assignee:
Appleton Papers Inc., Appleton, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
503210 ; 427150 ; 427151 ; 428913 ; 503208 ; 503209 ; 503211 ; 503212 ; 503216 ; 503217 ; 503225 ;
Abstract
An improved thermally-responsive record material having improved image retention is disclosed. The invention is an improved thermally-responsive record member, typically a sheet material, bearing a thermally-responsive color-forming composition comprising a chromogenic material, an acidic developer material, and a metal salt of a compound of the formula ##STR1## wherein M is a metal selected from Zn, Ca, Sn, Ni, Cu, Al, Co, and Mg; wherein m corresponds to the valency of M;