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. 15, 2011
Filed:
Oct. 16, 2007
Takashi Kozuchi, Suwa, JP;
Kazuhiko Hara, Suwa, JP;
Yukio Sugita, Yokohama, JP;
Mitsuyoshi Tamura, Yokohama, JP;
Fumie Yamazaki, Yokohama, JP;
Mitsuteru Yamada, Yokohama, JP;
Takashi Kozuchi, Suwa, JP;
Kazuhiko Hara, Suwa, JP;
Yukio Sugita, Yokohama, JP;
Mitsuyoshi Tamura, Yokohama, JP;
Fumie Yamazaki, Yokohama, JP;
Mitsuteru Yamada, Yokohama, JP;
Seiko Epson Corporation, Tokyo, JP;
The Inctec Inc., Kanagawa, JP;
Abstract
The invention provides an oil-based ink composition for ink jet recording, which is best suited for printing onto polyvinyl chloride substrates, and improved in terms of both the stabilities of ink on storage and jetting, and a method for inspecting the same. The oil-based ink composition for ink jet recording comprises as a main solvent at least a specific polyalkylene glycol dialkyl ether and containing at least a specific quinacridone pigment component. That composition should be such that when a measuring sample comprising it is analyzed by means of high speed liquid chromatography under specific measuring conditions, the concentration of a component having a peak at the holding time of 10.3 minutes is 0.4 ppm or less.