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. 10, 1985
Filed:
Jul. 10, 1984
Naoto Arai, Ikeda, JP;
Abstract
This invention provides a heat-sensitive record material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and containing a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the record material being characterized in that the heat-sensitive record layer contains as the color developing material at least one compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are each alkyl having 1 to 8 carbon atoms, a group ##STR2## or a group ##STR3## wherein R.sub.3 and R.sub.4 are each a hydrogen atom, chlorine atom, hydroxyl or alkoxy having 1 to 8 carbon atoms, the heat-sensitive record layer further containing at least one compound selected from the group consisting of 1,1-bis(4-hydroxyphenyl)cyclohexane and hindered phenol compounds.