Pyrrolidine derivatives
CA 2012295 C · Owner: Novartis International Pharmaceutical Ltd. · Inventors: Mackenzie, Alexander Roderick; Cross, Peter Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pyrrolidine muscarinic receptor antagonists particularly, useful in the treatment of irritable bowel syndrome of the formula:-, --- (I), and their pharmaceutically acceptable salts wherein Y is a direct link, -CH2-, -(CH2)2- -CH2O- or -CH2S-;, R is -CN or -CONH2; and R is a group of the formula:-, , or "Het" where X and X1 are each independently O or CH2; m is 1, 2 or 3;, and "Het" is pyridyl, pyrazinyl or thienyl.
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 15, 1990 and granted November 12, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2012.
- 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.