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:
Apr. 05, 2005
Filed:
Oct. 23, 2001
Satoru Yui, Tokyo, JP;
Naoki Sakurai, Tokyo, JP;
Koichi Ito, Tokyo, JP;
Zebra Co., Ltd., Tokyo, JP;
Abstract
There is provided a water based ink capable of decolorizing or discoloring written or printed letters or images through an organic solvent or heating, which is used for a writing instrument such as roller balls, makers, etc., printing inks, ink jets and the like. The water based ink comprises a colorant consisting of spherical fine grains colored by a color former, the spherical fine grains consisting of at least one member selected from polyolefins and other polymers containing, as a constitutional unit, at least one monomer selected from the group consisting of acrylonitrile, styrene, acrylic acid, methacrylic acid, methyl acrylate and methyl methacrylate.