Coagulation controls for prothbombin time (pt) and activated partial thromboplastin time (aptt)
CA 2334582 C · Owner: Sigma-Aldrich Co. · Inventors: Hawkins, Pamela L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coagulation control compositions suitable for use in connection with PT and/or APTT assays are disclosed along with their methods of preparation and methods of use. Preferred coagulation controls comprise plasma and an anticoagulant having activity for enhancing the activity of antithrombin III (ATIII) or of heparin co-factor II (HCII) against thrombin or against a clotting factor selected from the group consisting of factors IXa Xa and XIa. The , anticoagulant is preferably a glycosaminoglycan such as heparin a heparin , derivative or a heparin analog. The anticoagulant is preferably combined with (1) an abnormal plasma (e.g. activated plasma or factor-deficient plasma) and/or (2) a …
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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 June 21, 1999 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2021.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.