Membranes and membrane overlays for exclusion of erythrocytes for solid state assays
CA 2048530 A1 · Owner: Richards Mason, Karen · Inventors: Adams, Ernest C.; Killeen, Yvonne M.; Richards Mason, Karen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diagnostic test strip for chemically determining whole blood analytes comprises a support, a porous detection zone membrane affixed to the support, and an overlay membrane affixed to the support and in overlying and continuous contact with the detection zone membrane. The overlay membrane has a crenating agent for the exclusion of whole red blood cells from the pores of the detection zone membrane.
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 7, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2013.
- 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.