Hetero-biaryl-pyridoquinazolinone derivatives as anti-cancer agents
CA 2272915 A1 · Owner: Trova, Michael Peter · Inventors: Zhang, Nan; Trova, Michael Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a compound having the formula (1) wherein (A) n = 2-4; , (B) R1 and R2 are the same or different and selected from the group consisting of H, (C1-C3) alkyl, -CH2CH2OH, -CH2CH2NH2 and -CH2CH2N(CH3)2 or R1 and R2 , are alkyl moieties which are taken together to form a 4- to 7-membered ring; (C) R3 is selected from the group consisting of H -CH3, -CH2CH3, and -, CH2CH2NH2; (D) Y is a heterocyclic radical having 5-14 atoms located at the 2-, or 3-position of the pyridoquinazolinone nucleus in which 1-3 of the , heterocyclic ring atoms are independently nitrogen oxygen, or sulfur; wherein , Y may be optionally monodi-, or tri-substituted with -OR4, -NR5R6 -CO2H, -, …
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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 November 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2019.
- 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
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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.