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Expired Canadian patentCanada

Drug preparations of reduced toxicity

CA 1237670 A · Owner: The Liposome Company, Inc. · Inventors: Lenk, Robert P.; Weiner, Alan L.; Tremblay, Paul A.

CIPO record

Overview

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

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Abstract From the Canadian patent

Preparations of drugs in admixture with certain ligands are described which, when administered to animals or humans, are less toxic than conventional drug preparations. Although the toxicity of the drug-ligand preparations described is greatly reduced the drug, retains 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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
  • 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 11, 1984
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237670 A
Classification (IPC)A61K31/00 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 11, 1984Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

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