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:
Jun. 27, 1989
Filed:
Apr. 04, 1988
Shingo Araki, Settsu, JP;
Kikuo Tsuchiya, Nishinomiya, JP;
Masaji Inagaki, Ashiva, JP;
Yumi Kudoh, Osaka, JP;
Teijiro Kitao, Tondabayashi, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A thermosensitive recording sheet having a coated film containing a color-forming lactone compound, an acidic substance and a sensitizer, said sensitizer being a sulfur-containing dibasic acid ester represented by formula (I) ##STR1## wherein n is an integer of 1 to 3, m is an integer of 1 or 2, R.sup.1 and R.sup.2 may be the same or different and each denotes an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group, an aryl group, --C.sub.l H.sub.2l --Ar or --C.sub.l H.sub.2l --CO--AR in which l is an integer of 1 to 8 and Ar denotes an aryl group, provided the alkyl group having 1 to 20 carbon atoms may be substituted by a halogen atom, and the cycloalkyl group, the aryl group and Ar of --C.sub.l H.sub.2l --Ar or --C.sub.l H.sub.2l --CO--Ar may be substituted by an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, a phenacyl group, an alkyloxy group, an aryloxy group, an aralkyloxy group, an arylcarbonyl group, an arylsulfonyl group, a nitro group, an ammonium sulfonic acid group or a halogen atom.