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. 23, 1988
Filed:
Nov. 20, 1985
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A thermosensitive recording material comprising (a) a support material, (b) an undercoat layer formed thereon, comprising a polyvinyl alcohol having a saponification ratio ranging from 80 mole % to 95 mole %, which serves as water-soluble binder agent, a first water-resisting-property-improvement agent and a first organic filler, (c) a thermosensitive coloring layer formed on the undercoat layer, comprising a leuco dye, a color developer capable of inducing color formation in the leuco dye upon application of heat thereto and the same polyvinyl alcohol as first mentioned and (d) an overcoating layer formed on the thermosensitive coloring layer, comprising the same polyvinyl alcohol as first mentioned, a second water-resisting-property-improvement agent and a second organic filler.