Expired Canadian patentCanada
Preparative scale isolation and purification of taxanes
CA 2213952 C · Owner: Caron, Gaetan · Inventors: Zamir, Lolita; Caron, Gaetan
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 an improved method for isolating taxanes by using a preparative scale technique amenable to commercial production. This method provides high yields of known taxanes in addition to new taxanes.
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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 August 25, 1997 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.
FiledAugust 25, 1997
GrantedJune 15, 1999
Term endedAugust 25, 2017
Patent numberCA 2213952 C
Classification (IPC)C07D305/14
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.