Heterocyclic compounds and their preparation and use
CA 2105675 A1 · Owner: Novo Nordisk A/S · Inventors: Hansen, Holger C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Imidazotriazoloquinazoline compounds having general formula (I) wherein A together with the .alpha.-marked carbon atom and the .beta.-marked nitrogen atom is one of the groups (a) or (b); R1 is (c), (d), (e), (f), cyano or CO2R5, wherein R5 is H alkyl, cycloalkyl, trifluoromethyl or alkoxymethyl; and R2 R3 and, R4 independently are H, hydroxy halogen, CN, alkyl, alkenyl, alkynyl, trifluoromethyl alkoxy, dialkylaminoalkoxy, aralkoxy, aryloxy which may be substituted a cyclic amino group, or, NR6R7, wherein R6 and R7 independently are H or alkyl. The compounds are useful in psychopharmaceutical preparations as anticonvulsants, anxiolytics, hypnotics antipsychotics, antiemetics, or in , …
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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 February 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2014.
- 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.