Hollow yarn membrane used for blood purification and blood purifier
CA 2221722 A1 · Owner: Nagamatsu, Hiroshi · Inventors: Takata, Satoshi; Nagamatsu, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object of the present invention is to provide a polysulfone hollow fiber membrane for blood purification, which has no danger that any component of the membrane dissolves out, and which can be used suitably for hemodialysis and blood filtration and remove selectively and efficiently low-molecular-weight proteins having molecular weight of 10,000 to 30,000 contained in blood and , to provide a blood purifier, which can be used suitably as a hemodialyzer a , filter for hemodiafiltraion and a blood filter. The present invention is a hollow fiber membrane for blood purification comprising a polysulfone resin wherein there are slit-shaped micropores having an average width of 0.02 to …
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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 March 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2019.
- 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.