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. 24, 1997
Filed:
Sep. 29, 1995
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
503221 ; 427151 ; 503201 ; 503209 ; 503216 ; 503217 ;
Abstract
This invention generally relates to a reversible thermosensitive coloring composition and a thermosensitive recording medium using thereof which have high light-resisting characteristics, wherein coloring and decolorizing can be repeated suitably. A reversible thermosensitive coloring composition of this invention comprises an electron donating chromophoric compound and an electron accepting compound, which has a colored state and a decolorized state based on a heated temperature and a difference between cooling speeds after being heated, said electron donating chromophoric compound including a compound having a general formula (I) ##STR1##