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:
Feb. 07, 1989
Filed:
Dec. 23, 1987
Applicant:
Inventors:
Assignee:
Kanzaki Paper Manufacturing Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
503209 ; 427151 ; 428913 ; 503210 ; 503211 ; 503212 ; 503217 ; 503218 ; 503223 ;
Abstract
In a heat-sensitive recording material comprising on a substrate a recording layer containing a colorless or pale-colored basic dye and an electron accepting reactant material, the heat-sensitive recording material which is characterized in that the basic dye comprises at least one chromeno compound represented by the formula [I] below ##STR1## wherein G and R.sub.1 .about.R.sub.4 are defined in the specification.