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:
Jan. 26, 1982
Filed:
Aug. 14, 1980
Akihiro Yamaguchi, Kamakura, JP;
Keizaburo Yamaguchi, Kawasaki, JP;
Hisamichi Murakami, Yokohama, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Abstract
This invention discloses a heat sensitive recording sheet which contains, as a developer, at least one of the compounds represented by the general formula ##STR1## where R represents hydrogen, an alkyl radical of from 1 to 12 carbon atoms, a cycloalkyl radical of from 3 to 10 carbon atoms, an aralkyl radical of from 7 to 10 carbon atoms, and a phenyl radical, and may be identical to or different from each other, n is zero, or an integer of 1 or 2. The heat sensitive recording sheet of this invention has a sharper rise in developed color density and is advantageous for its handling and storage as well as gives a developed color image having an excellent fastness to light and water resistance in addition to very little decrease in density of the developed color image with time.