Gas plasma treated porous medium and method of separation using same
CA 2118686 C · Owner: Bormann, Thomas J. · Inventors: Bormann, Thomas J.; Matkovich, Vlado I.; Gsell, Thomas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A leukocyte depletion filter assembly and a method for removing leukocytes and other deleterious matter from a biological fluid, the filter assembly comprising a housing having an inlet, an outlet, a vent and a liquid flow path between the inlet and the outlet: and a degassing element communicating with the vent for removing gas from the fluid; and a porous medium positioned in the housing across the fluid flow path, the surface of the porous medium having been modified by exposure to a gas plasma stream.
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 September 10, 1992 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2014.
- 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.