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:
Aug. 05, 2025
Filed:
Jan. 23, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Maki Kato, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A technique capable of appropriately detecting a timing for replacement of a liquid ejection head is provided. The liquid ejection head includes a first electrode configured to protect an electrothermal conversion element that ejects a liquid from an ejection port and to be capable of eluting into the liquid by an electrochemical reaction with the liquid; and a second electrode installed so as to be electrically connectable to the first electrode via the liquid. A voltage is applied to cause the second electrode to generate the electrochemical reaction with the first electrode so that the first electrode is eluted into the liquid. Polarities can be reversed between the first electrode and the second electrode for applying the voltage, and wiring resistance in a circuit including a plurality of second electrodes as a part of wiring can be measured.