Blood separation filter assembly and method
CA 2133407 C · Owner: De Castro, Aurora · Inventors: Gupta, Surendra K.; Shultz, Janice L.; De Castro, Aurora
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Blood separation filter assemblies (15) and methods are provided to quickly and completely separate plasma or serum from whole blood without the need of centrifugation. The filter assembly (15) has a cylindrical well wall (13) of well structure (12) sandwiched between the retaining cover structure (16) and the well bottom (14). The filter assembly (15) having filter materials comprising at least one layer of glass fibers having an average fiber diameter ranging from 0.2 µm to 7.0 µm is maintained compressed at least 25 % in thickness in the well structure (12) to provide the fast separation of serum or plasma from a blood sample introduced through central aperture (17).
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 March 30, 1992 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.