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Expired Canadian patentCanada

Uses of interferons with altered spatial structure

CA 2535982 C · Owner: Huiyangtech (Usa), Inc. · Inventors: Wei, Guangwen

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

This invention provides a method for preventing or treating Severe Acute Respiratory Syndrome in a subject comprising administering to the subject an effective amount of recombinant super-compound interferon or a functional equivalent thereof. This invention provides a method for inhibiting the causative agent of Severe Acute Respiratory Syndrome comprising contacting the agent with an effective amount of super-compound interferon or its equivalent.

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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 August 26, 2004 and granted November 29, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 26, 2004
GrantedNovember 29, 2016
Term endedAugust 26, 2024
Patent numberCA 2535982 C
Classification (IPC)A61K38/21 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedAug 26, 2004Patent grantedNov 29, 2016Term endedAug 26, 2024

Sources & verification

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