Liquid discharge head, manufacturing method of liquid discharge head, head cartridge, and liquid discharge apparatus
CA 2290916 A1 · Owner: Yoshihira, Aya · Inventors: Kubota, Masahiko; Kudo, Kiyomitsu; Yoshihira, Aya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid discharge head has a plurality of first liquid flow passages connected to outlets for discharging the discharge liquid, a plurality of second liquid flow passages having an element board with heating elements for generating a bubble in the bubbling liquid and corresponding to the first liquid flow passages, and movable separation films substantially and mutually separating the first liquid flow passages and the second liquid flow passages at all times, wherein the movable separation films are mutually independent individual separation films for each of the second liquid flow passages. It is possible to directly provide a flow passage wall configuring a side wall of a first liquid …
Read the whole patent
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 November 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2021.
- 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
Timeline From CIPO dates
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.