Expired Canadian patentCanada
Crystal form i of clarithromycin
CA 2386527 C · Owner: Spanton, Stephen G. · Inventors: Riley, David A.; Spanton, Stephen G.; Liu, Jih-Hua
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns the novel antiobiotic 6-O-methylerythromycin A crystal Form I a process for its preparation, pharmaceutical compositions comprising this compound and a method of use as a therapeutic agent.
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 July 25, 1997 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 25, 1997
GrantedMay 27, 2003
Term endedJuly 25, 2017
Patent numberCA 2386527 C
Classification (IPC)C07H17/08 +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.