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:
Feb. 10, 2004
Filed:
Dec. 05, 2001
Kiyofumi Nagai, Tokyo, JP;
Hitoshi Arita, Kangawa, JP;
Nobutaka Osada, Misima, JP;
Masayuki Koyano, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A recording liquid including a coloring material, an organic solvent to disperse or to dissolve said coloring material, water, and a calix[n]arene-p-4-sulfonic acid (where n=4-8) in the form of free acid or its metal salt. The recording liquid is very suitable for inkjet recording using plain paper as recording medium. The recording liquid shows high storage stability, excellent color reproducibility with hard blurring property of mutual colors at superposed area thereof, and high resistively for light fading, for the sake of buffering nature based by both ion-capturing and -releasing, and hydrophobic material-capturing and -releasing bestowed by above-mentioned calix compound.