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Expired Canadian patentCanada

Anti-viral compounds

CA 1300622 C · Owner: Tolman, Richard L. · Inventors: Karkas, John D.; Field, Arthur K.; Ashton, Wallace T.

CIPO record

Overview

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Abstract From the Canadian patent

16672Y, ANTI-VIRAL COMPOUNDS, ABSTRACT OF DISCLOSURE 9-(1,3-dihydroxy-2-propoxymethyl)guanine and 9-(2,3-dihydroxy-1-propoxymethyl)guanine have been found to have potent anti-viral activity against herpes viruses. These compounds, their acyl derivatives, their phosphate derivatives and their pharmaceutically acceptable salts, pharmaceutical formulations containing, these compounds the treatment of viral infections, with these compounds methods of preparing these, compounds, and novel intermediates useful in their preparation are all disclosed. The compounds may be prepared by reaction of the appropriate acetoxymethyl ether with diacetylguanine, followed by deprotection. The acetoxymethyl …

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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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 25, 1982
GrantedMay 12, 1992
Term endedMay 12, 2009
Patent numberCA 1300622 C
Classification (IPC)C07D473/18 +2 more

Timeline

Timeline From CIPO dates

198319861989199219951998200120042007Application filedAug 25, 1982Patent grantedMay 12, 1992Term endedMay 12, 2009

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