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. 30, 1985
Filed:
Jul. 30, 1984
Toshitake Suzuki, Hyogo, JP;
Naoto Arai, Osaka, JP;
Shoji Aoyagi, Hyogo, JP;
Toranosuke Saito, Osaka, JP;
Masakatsu Kitani, Hyogo, JP;
Takashi Ishibashi, Osaka, JP;
Kanzaki Paper Manufacturing Co. Ltd., both of, JP;
Sanko Kaihatsu Kagaku Kenkyusho Corporation, both of, JP;
Abstract
In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that the color acceptor comprises at least one compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl or aralkyl, provided that R.sub.1 and R.sub.2, as well as R.sub.3 and R.sub.4, are not hydrogen at the same time.