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:
Jun. 03, 2003
Filed:
Mar. 13, 2000
Applicant:
Inventors:
Koichi Osumi, Kawasaki, JP;
Shinya Mishina, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 1/100 ;
U.S. Cl.
CPC ...
C09D 1/100 ;
Abstract
An ink contains a coloring material and an aqueous medium. The coloring material is composed of a self-dispersion-type carbon black. At least one hydrophilic group is bonded to the surface of the carbon black directly or through another atomic group. A K value of the ink determined by a Bristow's test method is less than 1.5, and the total amount of monovalent cations in the ink is in a range of 0.05 to 1 mole/liter. This ink exhibits superior ink-jet recording characteristics.