Cocaine derivatives and protein and polypeptide cocaine derivative conjugates and labels
CA 2106563 C · Owner: Buechler, Kenneth F. · Inventors: Buechler, Kenneth F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds are provided for the preparation of reagents including labels which can be used in immunoassays of cocaine and cocaine metabolites. The compounds are derivatives of cocaine which are conjugated to antigenic proteins or polypeptides for the formation of antibodies for use in immunoassays. The compounds also may be conjugated to labels for use in immunoassays.
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 16, 1992 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 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.