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Expired Canadian patentCanada

Therapeutic nucleosides

CA 1314875 C · Owner: Koszalka, George Walter · Inventors: Koszalka, George Walter; Krenitsky, Thomas Anthony

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention relates to certain 2',3'-dideoxynucleosides and pharmaceutically acceptable derivatives thereof methods for preparing them, their use in the treatment and prophylaxis of viral especially retroviral, infections and pharmaceutical formulations containing them.

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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 March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 14, 1986
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314875 C
Classification (IPC)C07H19/04 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 14, 1986Patent grantedMarch 23, 1993Term endedMarch 23, 2010

Sources & verification

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