Pyridopyrimidine derivatives
CA 2021925 A1 · Owner: Eli Lilly And Company · Inventors: Hackler, Ronald E.; Jourdan, Glen P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula (1): (1), wherein, one or two of A, B, E, or D are N and the, others are CR1 or A, E, and D are N and B is CR1; where R1 and R2 are independently H, halo, (C1-C4) alkyl (C3-C4) branched alkyl, (C1-C4) alkoxy halo (C1-C4), alkyl, phenyl, or substituted phenyl; X is O, S, SO, SO2, NR3, or CR4R5, where R3 is H, (C1-C4) alkyl, or (C1-C4) acyl, and R4 and R5 are independently H, (C1-C4) acyl, (C1-C4) alkyl (C2-C4) alk-, enyl or -alkynyl, CN, or OH or R4 and R5 combine to form, a carbocyclic ring containing four to six carbon atoms; Y is a bond or an alkylene chain one to six carbon atoms long, optionally including a carbocyclic ring, and optionally including a hetero …
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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 July 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 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.