Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head
CA 2210387 C · Owner: Kashino, Toshio · Inventors: Karita, Seiichiro; Kashino, Toshio; Asakawa, Yoshie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the present invention, the liquid discharge head comprises a first liquid flow path communicating with a discharge opening for discharging liquid, a second liquid flow path having a bubble-generating region in which bubbles are generated in the liquid by heating the liquid, a movable member located between the first liquid flow path and the bubble-generating region, having a free end on the side of the discharge opening, the free end moving toward the first liquid flow path by pressure exerted by bubbles generated in the bubble-generating region to direct the pressure toward the discharge opening, wherein the first liquid flow is provided in plural and wherein a, first supply …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 11, 1997 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.