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:
Sep. 17, 2013
Filed:
Mar. 28, 2006
Miharu Kanaya, Izumino, JP;
Tetsuya Aoyama, Shiojiri, JP;
Masahiro Hanmura, Kawasaki, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink composition comprises a pigment coated with a water-insoluble polymer as a coloring material, a resin emulsion as an additive, water, and a water-soluble organic compound. The weight average molecular weight of the water-insoluble polymer is from 50,000 to 150,000. The resin emulsion comprises a resin comprising a monomer component of the same kind as the monomer component constituting the water-insoluble polymer and has a weight average molecular weight of 1.5 to 4 times that of the water-insoluble polymer. The average particle size of the resin emulsion is from 20 to 200 nm, and the average particle size of pigment particles in the ink composition ranges from 50 to 150 nm.