Systems and methods for removing undesired matter from blood cells
CA 2086514 A1 · Owner: Stewart, Mary A. · Inventors: Stewart, Mary A.; Johnson, Kenneth M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods of collecting blood cells use a first container (16) connected to initially collect blood. A filtration system (14) is provided that uses two flow paths (34 38), the first, (38) being a dual purpose path that is initially used to convey plasma and platelets to a pair of transfer/storage containers (30 32). A second flow path (34) leads to a temporary transfer container (28) through a filtration device (36). The dual purpose fluid path (38) is next used to convey blood cells not substantially, free of undesired matter from the temporary storage container, (28) to a storage container (18). The filtration system (14) is then detached from the blood collection system (12).
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 April 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 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.