Substituted dibenz-oxa-thiocinones, -12-oxides and -12, 12-dioxides, a process for their preparation and their use in medicaments
CA 2057357 A1 · Owner: Beuck, Martin · Inventors: Lenfers, Jan-Bernd; Stasch, Johannes-Peter; Frobel, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are substituted dibenzoxathiocinones,-12oxides and -12,12-dioxides of the general formula: (I), wherein R1 and R6 are each hydrogen or optionally substituted alkyl or alkenyl, R is hydrogen or OR7 (in which R7 is hydrogen cyclo-, alkyl or optionally substituted alkyl alkenyl or acyl), R3, R4 and R5 are each hydrogen nitro, halogen or alkyl, Y is S, SO or SO2 processes for their preparation and their use in medicaments in, particular in circulation-influencing medicaments.
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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 December 10, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2013.
- 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.