Gamma emitting, cck-a antagonists for pancreatic imaging
CA 2037299 C · Owner: Gibson, Raymond E. · Inventors: Burns, H. Donald; Brenner, Nancy J.; Gibson, Raymond E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel radiolabeled cholecystokinin-A (CCK-A) antagonists have been developed having the general structure formula I:, (see above formula), which after intravenous injection, localize in the pancreas as a result of specific binding to CCK-A receptors. These tracers, when labeled with appropriate radiohalogens are, useful as commercial diagnostic imaging radiopharmaceuticals and radiotherapeutic drugs.
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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 February 28, 1991 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.