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. 18, 1986
Filed:
Nov. 09, 1984
Takanori Motosugi, Numazu, JP;
Hisashi Sakai, Numazu, JP;
Ricoh Company, Ltd, Tokyo, JP;
Abstract
A thermosensitive recording material which comprises a support material and a thermosensitive color-forming layer formed on the support material, comprising a colorless or light-colored leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, is disclosed, in which the color developer is 4-hydroxydimethylphthalate or a first bisphenol derivative of the formula (I) ##STR1## wherein n is an integer of 1 or 2, and there is interposed between the support material and the thermosensitive color-forming layer an undercoated layer comprising a second bisphenol derivative of the formula (II), ##STR2## wherein X represents halogen, Y represents --SO.sub.2 --or-- ##STR3## m is an integer of 1 or 2, and the substitution positions of Xm in the benzene rings are symmetrical with respect to Y.