Immunoassays for prostate specific antigen
CA 2546529 A1 · Owner: Dowell, Barry L. · Inventors: O`Morchoe, Susan B.; Alexander, Debra B.; King, Carol A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the field of cancer immunoassay. Specifically a new immunoassay method for prostate specific antigen (PSA) is presented. Also presented is a complex which resembles a complex of PSA and .alpha.-antichymotrypsin (ACT) that can be used as a calibrator or control in an, immunoassay for PSA. Further presented is a method for fractionating polyclonal, antibodies, to PSA, into those which bind epitopes that are masked by the binding, of PSA to ACT and those which do not bind such epitopes.
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 December 22, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2016.
- 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.