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. 25, 2005
Filed:
Mar. 22, 2002
Yoshikazu Kaneko, Numazu, JP;
Yasutomo Mori, Numazu, JP;
Kunio Hayakawa, Mishima, JP;
Mitsunobu Morita, Numazu, JP;
Takeshi Kajikawa, Shizuoka, JP;
Shuuji Miyamoto, Numazu, JP;
Yuuichi Kawaguchi, Numazu, JP;
Yoshikazu Kaneko, Numazu, JP;
Yasutomo Mori, Numazu, JP;
Kunio Hayakawa, Mishima, JP;
Mitsunobu Morita, Numazu, JP;
Takeshi Kajikawa, Shizuoka, JP;
Shuuji Miyamoto, Numazu, JP;
Yuuichi Kawaguchi, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
There is provided a leuco dye dispersion liquid for a thermosensitive recording material wherein the leuco dye is being dispersed with an anionic surfactant and an nonionic surfactant, while average particle diameter of the leuco dye ranges from 0.10 μm to 0.30 μm and content of particles less than or equal to 0.07 μm in diameter of the dye is not greater than 1.0%. The leuco dye dispersion liquid shows no fogging, and can cause a high optical density of image on thermosensitive member with excellent brightness in background area, and a high durability for storage at elevated temperature.