Leucocyte-removing filter medium
CA 2301726 C · Owner: Asahi Kasei Kuraray Medical Co. Ltd. · Inventors: Toma, Norio; 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 medium for removing leukocytes from a leukocyte-containing fluid wherein said, filter medium has, at least on its surface hydrophilic basic, groups containing at least one nonionic hydrophilic portion and at least one basic portion, in which said hydrophilic portions) is located nearer to the end of the hydrophilic basic group than said basic portion(s) is.
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 25, 1998 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2020.
- 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.