N-alkenylbenzo(b) thieno-(3,2-b) oxazin-2,4-diones
CA 2013799 C · Owner: Pfizer Inc. · Inventors: Marfat, Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N-ALKENYLBENZObTHIENO-, 3,2-bOXAZIN-2,4-DIONES Abstract, Cyclic pro-drugs of N-alkenyl-3-hydroxybenzobthiophene-3-carboxamides which exhibit cyclooxygenase and 5-lipoxygenase inhibitory activity, pharmaceutical compositions thereof, and the use of such pro-drugs to treat inflammation, pain, fever and other prostaglandin and leukotriene mediated diseases. (II), wherein X is hydrogen trifluoromethyl, fluoro, chloro, lower alkyl lower alkoxy, lower alkylthio, phenyl or 2,4difluorophenyl; each of R1 and R2 is hydrogen phenyl, sub-, stituted phenyl wherein the substituent is chloro fluoro, lower alkyl, lower alkoxy, lower alkylthio or hydroxy; thienyl, substituted thienyl wherein the substituent …
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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 April 4, 1990 and granted December 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 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.