Benzodiazepine derivatives and protein and polypeptide conjugates thereof
CA 2132341 A1 · Owner: Biosite Diagnostics Incorporated · Inventors: Buechler, Kenneth F.; Noar, Joseph B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to novel benzodiazepine derivatives which are synthesized for the covalent attachment to antigens (proteins or polypeptides) for the preparation of antibodies or receptors to the benzodiazepine metabolites. The resulting novel antigens may be used for the production of antibodies or receptors using standard methods. Once generated the antibodies or, receptors and the novel derivatives which are covalently attached to proteins, polypeptides or labels may be used in the immunoassay process.
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 March 31, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2015.
- 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.