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Expired Canadian patentCanada

Dideoxydidehydrocarbocyclic nucleosides

CA 1339803 C · Owner: Hua, Mei · Inventors: Vince, Robert; Hua, Mei

CIPO record

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Abstract From the Canadian patent

Compounds of formula (I), (see fig. I) (wherein X is hydrogen, NRR1, SR, OR or halogen; R and R1 may be the same or different and are selected from hydrogen C1-4alkyl and aryl), and pharmaceutically acceptable derivatives thereof are described having anticancer activity.

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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 April 7, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 19, 1989
GrantedApril 7, 1998
Term endedApril 7, 2015
Patent numberCA 1339803 C
Classification (IPC)C07D487/04 +1 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedJan 19, 1989Patent grantedApril 7, 1998Term endedApril 7, 2015

Sources & verification

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