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:
Aug. 25, 2009
Filed:
Sep. 11, 2007
Yoshio Nakajima, Yokohama, JP;
Sadayuki Sugama, Tsukuba, JP;
Shin-ichi Hakamada, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides an aqueous ink that can prevent clogging at an orifice due to drying of the ink though the ink contains a pigment, and can achieve high-level ejection stability required in recent years. The aqueous ink contains at least water, a water-soluble organic solvent and carbon black particles, the carbon black particles including carbon black particles having a particle size of 0.5 μm or more, wherein a proportion made up by the volume of carbon black particles having a particle size of 0.2 μm or more and less than 0.5 μm is 0.3% or less based on the total volume of all the carbon black particles in the ink, a number of carbon black particles having a particle size of 0.5 μm or more and less than 5.0 μm is 1.0×10or less per mL of the aqueous ink, and an average particle size value of the carbon black particles is from 0.060 μm or more to 0.130 μm or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile