Pyrimidine derivatives
CA 1292987 C · Owner: Thomas, Gareth J. · Inventors: Martin, Joseph A.; Thomas, Gareth J.; Lambert, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula, I, wherein R1 is halogen C1-4-alkyl or halo-(C1-4-, -alkyl), R2 is hydrogen hydroxy or acyloxy, R3 and, R4 each are hydrogen or C1-4-alkyl R5 is aryl or, aryloxy, X is 0 or NH and Y is -CO-CH2- -CH(OH)-CH2, -CH2-CH2-, -S-, -SO- or -SO2and tautomers thereof, possess antiviral activity and can be used in the form of medicaments for the control and prevention of viral infections. They can be manufactured according to methods known per se.
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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
- Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.