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Expired Canadian patentCanada

Sustained-release particulate preparation and process for preparing the same

CA 1315200 C · Owner: Machida, Minoru · Inventors: Machida, Minoru; Arakawa, Masayuki

CIPO record

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

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Abstract From the Canadian patent

Abstract: A sustained-release particulate preparation having a controlled releasing rate of a pharmacologically active agent contained therein in the living body and a process, for preparing the preparation are disclosed. The preparation comprises a polymeric compound which is capable of being degraded in the living body and which is compatible with living tissue, a pharmacologically active agent and a, natural high molecular weight compound of sugar origin or a derivative thereof. The preparation has fine and uniform particle size and can be administered subcutaneously or intramuscularly for obtaining a long-lasting pharmacological 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 March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 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.
FiledOctober 6, 1987
GrantedMarch 30, 1993
Term endedMarch 30, 2010
Patent numberCA 1315200 C
Classification (IPC)A61K9/14 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 6, 1987Patent grantedMarch 30, 1993Term endedMarch 30, 2010

Sources & verification

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