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:
Aug. 01, 2000
Filed:
Oct. 24, 1997
Tetsuya Amano, Numazu, JP;
Kazumi Suzuki, Shimiqu-machi, JP;
Atsushi Kutami, Numazu, JP;
Yoshihiko Hotta, Mishima, JP;
Kunichika Moroboshi, Namazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A reversible thermosensitive recording medium having a supporting substrate and a reversible thermosensitive recording layer formed on the supporting substrate, being capable of reversibly varying color density depending upon temperature with improved durability, is provided. The recording medium has the rates of changes in recording sensitivity and in erasure sensitivity, which are caused by the immersion in an artificial perspiration liquid, of 50% or less and 80% or more, respectively, and an average maximum particle size of organic materials of 2.5 microns at most.