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:
Sep. 22, 1998
Filed:
Dec. 06, 1996
Tadakazu Fukuchi, Tokyo, JP;
Kaoru Hamada, Tokyo, JP;
Tomoaki Nagai, Tokyo, JP;
Nobuhiro Kudoh, Tokyo, JP;
Akio Sekine, Tokyo, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Abstract
In a thermal sensitive recording medium comprising a thermal sensitive color developing layer which includes a basic leuco dye and an organic color developer on a substrate, characterized by the said thermal color developing layer includes 0.01-0.9 parts of aminobenzenesulfonamide derivatives indicated by general formula (I) based on 1 part of color developer and also includes at least one kind of methylolated fatty acid amide indicated by general formula (II) in proportion of 0.01-2 parts based on 1 part of color developer. ##STR1## (wherein, 'X' indicates an oxygen or sulfur atom, 'R' indicates non-substituted or substituted phenyl group, naphthyl group, aralkyl group, lower alkyl group of carbon number 1-6, cycloalkyl group of carbon number 3-6 or lower alkenyl group of carbon number 2-6. 'Z' indicates lower alkyl group of carbon number 1-6 or electron attractive group. 'n' indicates an integer from 0 to 4 and 'P' indicates an integer from 1 to 5, wherein satisfies the numerical formula of n+p.ltoreq.5)