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. 10, 2025
Filed:
Jan. 29, 2021
Seiko Epson Corporation, Toyko, JP;
Kiyomi Kumamoto, Shiojiri, JP;
Yusuke Mizutaki, Shiojiri, JP;
Jun Ito, Shimosuwa, JP;
Tomohito Nakano, Shiojiri, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
An ink jet ink set includes: an aqueous dye ink and an aqueous pigment ink, the ink jet ink set is an ink set to be used for an ink jet recording apparatus which has a first ejection port to eject the aqueous dye ink, a second ejection port to eject the aqueous pigment ink, and a cap to collectively cap the first ejection port and the second ejection port, the cap being composed of the same member as that forming the first ejection port and the second ejection port, the aqueous dye ink contains a dye and a poly(oxyalkylene) alkyl ether, the dye includes a copper phthalocyanine compound having two or less benzene ring structures other than a phthalocyanine skeleton, and the aqueous pigment ink contains a self-dispersible pigment.