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:
Oct. 28, 2025
Filed:
Aug. 28, 2023
Seiko Epson Corporation, Tokyo, JP;
Yuko Hishida, Matsumoto, JP;
Miki Uchida, Matsumoto, JP;
Yusuke Mizutaki, Shiojiri, JP;
Hiromichi Takanashi, Shiojiri, JP;
Tomohiro Kawasaki, Shiojiri, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A maintenance liquid is used to maintain an ink jet head of a printing apparatus configured to eject an ink for printing from the ink jet head. The maintenance liquid is aqueous and subject to detection by a conductivity-based sensor. The maintenance liquid includes at least one selected from the group consisting of inorganic alkalis and ethylenediaminetetraacetic acid compounds and at least one selected from the group consisting of organic acids and organic alkalis. The maintenance liquid has an electrical conductivity of 100 μS/cm or more and a pH of 6.0 to 11.