Expired Canadian patentCanada
Difluoro statone analogs
CA 2249786 C · Owner: Merrell Pharmaceuticals Inc. · Inventors: Tarnus, Celine; Schirlin, Daniel; Van Dorsselaer, Viviane
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel difluoro statone analogs of Formula 1 to the processes and intermediates useful for their preparation and to their use as anti-viral agents.
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 June 7, 1994 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 7, 1994
GrantedOctober 28, 2003
Term endedJune 7, 2014
Patent numberCA 2249786 C
Classification (IPC)C07C271/20 +2 more
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.