Liquid container
CA 2476705 C · Owner: Kimura, Hitotoshi · Inventors: Kimura, Hitotoshi; Seino, Takeo; Ishizawa, Taku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an ink pack 24 stored in an ink cartridge 20 of a printer, a first welded portion is formed by bonding both end portions of a sheet of film to each other. A tube--shaped bag portion 31 is formed by the first welded portion. One opening of the bag portion 31 is thermally welded in a state where a supply member 27 is inserted into the film thereby forming a second welded portion 38. The other opening of the bag portion is sealed through the thermal adhesion, thereby forming a third welded portion 39. The ink volume capable of being stored in the bag portion 31 of the ink pack 24 is larger than the volume in a frame 26c for storing the ink pack 24.
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 August 6, 2004 and granted November 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2026.
- 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.