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Expired Canadian patentCanada

Use of chondroitinase abc enzyme for the treatment of cns injuries

CA 2525804 C · Owner: Gruskin, Elliott A. · Inventors: Blight, Andrew R.; Gruskin, Elliott A.; Zimber, Michael P.

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

The present invention is directed to a method of improving functional recovery following a central nervous system contusion injury. The method includes administering a therapeutically effective amount of glycosaminoglycan degrading enzyme. The glycosaminoglycan degrading enzyme may be dermatan sulfate or chondroitin sulfate degrading enzymes. The central nervous system contusion injury may include a traumatic brain injury or a spinal cord injury. The functional recovery may include autonomic functions sensory functions, motor functions or the like.

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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 May 17, 2004 and granted April 25, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 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.
FiledMay 17, 2004
GrantedApril 25, 2017
Term endedMay 17, 2024
Patent numberCA 2525804 C
Classification (IPC)A61K38/51

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMay 17, 2004Patent grantedApril 25, 2017Term endedMay 17, 2024

Sources & verification

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