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:
Apr. 03, 2007
Filed:
Dec. 30, 2005
Kunihiko Nakamura, Shizuoka, JP;
Shin-ichi Sato, Kanagawa, JP;
Jun Yoshizawa, Tokyo, JP;
Kumiko Mafune, Kanagawa, JP;
Hideki Takayama, Kanagawa, JP;
Daiji Okamura, Kanagawa, JP;
Kunihiko Nakamura, Shizuoka, JP;
Shin-ichi Sato, Kanagawa, JP;
Jun Yoshizawa, Tokyo, JP;
Kumiko Mafune, Kanagawa, JP;
Hideki Takayama, Kanagawa, JP;
Daiji Okamura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
It is an object of the present invention to provide a black ink for an ink jet which possesses preferable color as a black ink for an ink jet, can attain high ozone resistance, high image density and sticking recovery property, and can suppress the decomposition of the compound represented by the general formula (I) or salt thereof during long-term storage. According to the present invention, there is provided a black ink for an ink jet characterized by comprising at least a compound represented by the following general formula (I) or a salt thereof, characterized in that the black ink comprises at least one moisture-retaining nitrogen compound, and the pH of the ink and the pH of the ink after storing for 10 days in an environment at a temperature of 60° C. are 9.5 or less.