Expired Canadian patentCanada
O-demethylation of pharmaceutical intermediates using microorganism of the genus monosporium or thamnostylum
CA 2280994 C · Owner: Pfizer Products Inc. · Inventors: Truesdell, Susan Jane
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 relates to the use of microorganisms of the Monosporium and, Thamostylum genera to diastereoselectively O-demethylate pharmaceutical intermediates, to, produce compounds of the formulae:
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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 26, 1999 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2021.
- 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 26, 1999
GrantedDecember 24, 2002
Term endedAugust 26, 2019
Patent numberCA 2280994 C
Classification (IPC)C12P17/10 +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.