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:
Apr. 26, 1977
Filed:
May. 14, 1975
Mitsubishi Paper Mills, Ltd., Tokyo, JA;
Abstract
This invention discloses a heat-sensitive recording sheet which comprises a support and, coated thereon, a heat-sensitive composition containing an organic base and at least one acylated lactone or sultone type acidic leuco dye capable of forming a color by reaction with said organic base at an elevated temperature. The invention further discloses as one embodiment a multicolor heat-sensitive recording sheet prepared by adding to the above-mentioned chromogenic system a chromogenic system comprising a normally solid phenolic substance and at least one basic chromogenic substance capable of forming a color by reaction with said phenolic substance at an elevated temperature. Preferable examples of the above-mentioned leuco dye are acrylated xanthene lactone type leuco dyes.