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:
Jul. 30, 2002
Filed:
Oct. 21, 1999
Applicant:
Inventors:
Hisashi Teraoka, Kawasaki, JP;
Shinya Mishina, Kawasaki, JP;
Mikio Sanada, Yokohama, JP;
Koichi Osumi, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 1/100 ; C09D 1/102 ;
U.S. Cl.
CPC ...
G01D 1/100 ; C09D 1/102 ;
Abstract
An ink set comprising a black ink and a color ink, suitable for an ink-jet recording apparatus comprising a common recovery system for a black ink-ejecting orifice and a color ink-ejecting orifice. The black ink comprises particles of self-dispersing carbon black having at least one anionic hydrophilic group at the surface thereof in an aqueous medium, and the pH of the color ink is higher than the pH of the black ink.