Medical valve and method of producing the same, catheter with valve, and catheter assembly
CA 2023462 C · Owner: Terumo Kabushiki Kaisha · Inventors: Oshiyama, Hiroaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A medical valve comprises a valve member made of a flexible elastic material and having at least two faces. A first slit is disposed between a first face of said at least two faces and a second face of said at least two faces, and a second slit is disposed between said first face and said second face, wherein the first slit and the second slit intersect each other. A first opening width of the first slit on the first face is different from a second opening width of the first slit on the second face, and a first opening width of the second slit on the first face is different from a second opening width of the second slit on the second face. A catheter assembly comprises a catheter and a …
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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 August 16, 1990 and granted April 9, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2012.
- 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.