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, 1994
Filed:
Sep. 18, 1992
Yoshimitsu Tanabe, Yokohama, JP;
Yuki Kobayashi, Kamakura, JP;
Atsuo Otsuji, Yokohama, JP;
Masakatsu Nakatsuka, Yokohama, JP;
Kiyoharu Hasegawa, Yokohama, JP;
Kazuyoshi Kikkawa, Kamakura, JP;
Akihiro Yamaguchi, Kamakura, JP;
Naomasa Koike, Tokyo, JP;
Fumio Okumura, Tokyo, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Mitsubishi Paper Mills Limited, Tokyo, JP;
Abstract
A heat-sensitive recording material comprising a color forming, electron donating compound and a salicylic acid derivative represented by the formula (1): ##STR1## wherein X.sub.1 and X.sub.2 are a hydrogen atom, an alkyl group, an alkoxy group, an aralkyl group, an aryl group or a halogen atom, Y.sub.1 and Y.sub.2 are an oxygen atom or a sulfur atom, R.sub.1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group , and R.sub.2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group, and/or a metal salt of the salicylic acid derivative as an electron accepting compound, is disclosed.