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Expired Canadian patentCanada

Antiviral compounds and antihypertensive compounds

CA 2091172 C · Owner: Weinstein, Jay · Inventors: Weinstein, Jay; Gentles, Margaret Jevnik; Afonso, Adriano

CIPO record

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Abstract From the Canadian patent

Compounds useful as antihypertensive agents and useful as antiviral agents against viruses,such as herpes group viruses, are disclosed. The compounds are represented by formula (1.0) and their pharmaceutically acceptable salts and solvates. Pharmaceutical compositions containing compounds represented by formula (1.0) are disclosed. Methods of treating a viral infection using compounds represented by formula (1.0) are disclosed. Also disclosed are methods of treating hypertension using compounds of formula (1.0) wherein R is selected from the group consisting of H halogen and -C(O)OR6; and R1, is selected from the group consisting of -ORI4 -O(CH2)aaC(H)3jZj and -O(CH2)hN(RI5)2.

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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 September 6, 1991 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 6, 1991
GrantedMay 20, 1997
Term endedSeptember 6, 2011
Patent numberCA 2091172 C
Classification (IPC)C07D215/22 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedSep 6, 1991Patent grantedMay 20, 1997Term endedSep 6, 2011

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.