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Expired Canadian patentCanada

Immunoneutral silk-fiber-based medical devices

CA 2518509 C · Owner: Chen, Jingsong · Inventors: Horan, Rebecca L.; Chen, Jingsong; Altman, Gregory H.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Silk is purified to eliminate immunogenic components (particularly sericin) and is used to form tissue-supporting prosthetic devices for implantation. The fabrics can carry functional groups, drugs and other biological reagents. , Applications include hernia repair tissue wall reconstruction, and organ support, such as bladder slings. The silk fibers are arranged in parallel and optionally, intertwined (e.g. twisted) to form a construct; sericin may be extracted at any point during the formation of the fabric leaving a construct , of silk fibroin fibers having excellent tensile strength and other mechanical properties.

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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 March 11, 2004 and granted April 29, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.
FiledMarch 11, 2004
GrantedApril 29, 2014
Term endedMarch 11, 2024
Patent numberCA 2518509 C
Classification (IPC)D02G3/02 +2 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMarch 11, 2004Patent grantedApril 29, 2014Term endedMarch 11, 2024

Sources & verification

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