Leukocyte-removing filter material
CA 2213092 C · Owner: Fukuda, Tatsuya · Inventors: Tanaka, Jun; Yoshida, Kumi; Fukuda, Tatsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A leukocyte-removing filter material which consists of a porous element having fine pores of an average pore diameter of not less than 1.0 µm but less than 100 µm and a fiber structure composed of a plurality of fibers having an average fiber diameter of not less than 0.01 µm but less than 1.0 µm kept on the above porous element, wherein the porosity of the above filter material is not less than 50% but less than 95% the, proportion of the above fiber structure to the above filter material is not less than 0.01% by weight but less than 30% by weight, the ratio between the average pore diameter of the above porous element and the average fiber diameter of the above fiber structure is not …
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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 December 26, 1996 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2018.
- 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.