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Expired Canadian patentCanada

Methods and compositions for the prevention of tolerance to medications

CA 2348926 C · Owner: Ahmed, Tahir · Inventors: Ahmed, Tahir

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

The present invention pertains to the identification of moieties and methods of using the same for preventing tolerance to bronchodilators. More specifically, the present invention pertains to the identification of compositions and methods which are capable of preventing tolerance to .beta. 2adrenergic agonists. The methods and compositions according to the invention are also useful as analytical tools for functional studies and as combination therapeutic tools.

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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

  • Filed October 13, 1999 and granted August 23, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2021.
  • 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 13, 1999
GrantedAugust 23, 2011
Term endedOctober 13, 2019
Patent numberCA 2348926 C
Classification (IPC)A61K31/72 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedOct 13, 1999Patent grantedAug 23, 2011Term endedOct 13, 2019

Sources & verification

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