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Expired Canadian patentCanada

Piperazinyl derivatives of purines and isosteres thereof as hypoglycemic agents

CA 1341043 C · Owner: Johnston, David B. R. · Inventors: Maccoss, Malcolm; Johnston, David B. R.; Meurer, Laura C.

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Abstract From the Canadian patent

There are disclosed certain 6-piperazino-purines and heteroaromatic derivatives thereof which have oral hypoglycemic activity and with such ability to lower blood sugar are useful in the treatment of type II diabetes and/or obesity with associated insulin resistance. Processes for the preparation of such compounds and compositions containing such compounds as the active ingredient thereof are also disclosed.

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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 July 4, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 4, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 19, 1988
GrantedJuly 4, 2000
Term endedJuly 4, 2017
Patent numberCA 1341043 C
Classification (IPC)C07D471/04 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007201020132016Application filedJuly 19, 1988Patent grantedJuly 4, 2000Term endedJuly 4, 2017

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