Secondary filter cleaning method in blood plasma filtration method
CA 2132352 A1 · Owner: Yonekawa, Motoki · Inventors: Kaneko, Osamu; Yonekawa, Motoki; Kawamura, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a blood plasma filtration method including a primary filtering for separating blood into corpuscule and plasma and a secondary filtering for cleaning the separated plasma by removing harmful macromolecular substances therefrom the, cleaning of the secondary filter is done by introducing a cleaning liquid the quantity of which corresponds to 5-50 % of the priming volume of the filter into an inner chamber or an outer chamber or both thereof in the filter every time a filtration pressure reaches 70-100 % of the resistible pressure of the filter. This enables the time required to carry out the filtration of blood plasma to be reduced to about 60 - 70 % of that in a conventional method of …
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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 January 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2016.
- 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
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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.