ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,377,655, issued on Aug. 5, was assigned to Canon K.K. (Tokyo).
"Liquid ejection head and cleaning method" was invented by Maki Kato (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "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...