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Expired Canadian patentCanada

Porous synthetic bone graft and method of manufacture thereof

CA 2417895 C · Owner: Lo, Wei Jen · Inventors: Lo, Wei Jen

CIPO record

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Abstract From the Canadian patent

Synthetic bone for grafts avoid the necessity of autograft. Commercially available , synthetic bone grafts have inconsistent pore size and may fail to enable osteoingrowth. The present invention permits controllable pore size shape and , pore , orientation enabling improved bone replacement. A process for preparing artificial bone is described which comprises: (i) preparing a , mixture of a finely divided bio-compatible ceramic powder an organic binder , and a , pore-forming agent in an inert liquid to form a body and causing at least some of the , pore-forming agent to align along a common axis; (ii) optionally shaping the resulting , body; (iii) allowing the pore-forming agent to …

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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 July 27, 2001 and granted September 27, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 27, 2001
GrantedSeptember 27, 2011
Term endedJuly 27, 2021
Patent numberCA 2417895 C
Classification (IPC)A61L27/12 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedJuly 27, 2001Patent grantedSep 27, 2011Term endedJuly 27, 2021

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