1-oxa-2-oxo-8-azaspiro/4,5/decane derivatives, pharmaceutical compositions containing them and process for preparing the same
CA 2023019 A1 · Owner: Torley, Jozsef · Inventors: Csomor, Katalin; Groo, Dora; Kiss, Bela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
NOVEL 1-OXA-2-OXO-8-AZASPIROL4,5DECANE DERIVATIVES PHARMACEUTICAL COMPOSITIONS CONTAINING THEM AND PROCESS FOR PREPARING SAME, Abstract, The invention relates to novel l-oxa-2-oxo-8- -azaspiro4,5decane derivatives of the formula (I) (I), wherein, X means oxygen or an ?NR group wherein, R stands for hydrogen, a C1-12alkyl C3-6cyclo-, alkyl, carbocyclic C6-10aryl or carbocyclic C6-10aryl-C1-4alkyl group, the two latter are optionally substituted on their aromatic part by one or more, same or different halogen(s) one or more C1-4alkyl or C1-4alkoxy group(s); R1 and R2 together represent a methylene group or when, X stands for an ?NR group, wherein R is as defined above, one of R1 and R2 may …
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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 9, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 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.