Liquid container, method of manufacturing the container, package of the container, ink jet head cartridge in which the container and a recording head are made integral with each other, and liquid discharge recording apparatus
CA 2271408 C · Owner: Iwanaga, Shuzo · Inventors: Hattori, Shozo; Inoue, Chiyoshi; Udagawa, Kenta
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid container having a negative pressure generating member containing chamber containing therein a negative pressure generating member formed of a fiber material and provided with a liquid supplying portion and an atmosphere communicating portion a liquid containing chamber provided with a communicating portion communicating with the negative pressure generating member containing chamber and forming a substantially hermetically sealed space and storing therein liquid to be supplied to the negative pressure generating member and a partition wall for partitioning the negative pressure generating member containing chamber and the liquid containing chamber and forming the communicating …
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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 May 10, 1999 and granted September 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 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.