Bile acid derivatives, processes for the preparation thereof and pharmaceutical compositions containing them
CA 2014544 C · Owner: Frigerio, Giuliano · Inventors: Roda, Aldo; Frigerio, Giuliano; Pellicciari, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of general formula I, (See formula I) wherein R1 is hydrogen or hydroxy, and the hydroxy group at the 7-position can be either in or .beta. configuration are valuable in human therapy. Compounds I can be prepared by reacting with succinic acid carboanions the corresponding derivatives Which have previously been protected, and subsequently deprotecting and decarboxylating them.
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 April 12, 1990 and granted June 12, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.