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. 19, 1998
Filed:
Sep. 19, 1996
Kaoru Hamada, Shinjuku-ku, JP;
Yoshimi Midorikawa, Shinjuku-ku, JP;
Yutaka Wakita, Shinjuku-ku, JP;
Tomoaki Nagai, Shinjuku-ku, JP;
Akio Sekine, Shinjuku-ku, JP;
Hiroshi Ueda, Shinjuku-ku, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Abstract
A thermal sensitive recording sheet comprising a substrate having thereon a thermal sensitive color developing layer mainly composed of basic leuco dye and an organic color developer, characterized by said thermal sensitive developing layer includes derivatives of amino benzene sulfone amide indicated by general formula (I) as an organic color developer, and includes sulfone amide compound indicated by general formula (II) as a sensitizer by amount of 0.01-2 parts based on 1 part of the color developer indicated by general formula (I). ##STR1## wherein 'X' indicates an oxygen or sulfur atom, 'Y' indicates a lower alkyl group of carbon number 1-4 or electron attracting group and 'm' indicates an integral number from 0 to 4. 'R' indicates a non-substituted or a substituted phenyl group, aralkyl group, lower alkyl group of carbon number 1-6, cycloalkyl group of carbon number 3-6, lower alkenyl group of carbon number 2-6 or naphthyl group. ##STR2## wherein 'Z' indicates a lower alkyl group of carbon number 1-6 or electron attracting group. 'n' indicates an integral number from 0 to 2.