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:
May. 14, 2002
Filed:
Jun. 07, 2000
Tadaaki Ito, Osaku-fu, JP;
Sakura Color Products Corporation, Osaka-fu, JP;
Abstract
The present invention provides an aqueous ink composition for ball-point pens comprising a titanium oxide as a white pigment, a viscosity modifier and flat-shaped resin particles. The color of the aqueous ink composition can be adjusted by coloring agents (such as a pigment). The viscosity of the aqueous ink composition is 100 cps to 20,000 cps at 20° C. The average particle diameter of said flat-shaped resin particles is 0.05 &mgr;m to 10 &mgr;m and the content thereof is 1% by weight to 35% by weight with respect to the total amount of the aqueous ink composition. The content of the titanium oxide is 5% by weight to 55% by weight with respect to the total amount of the aqueous ink composition. As a viscosity modifier, a polysaccharide is used and the content thereof is 0.1% by weight to 2% by weight with respect to the total amount of the aqueous ink composition.