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Expired Canadian patentCanada

Orthopedic casting materials and methods

CA 1317837 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Ersfeld, Dean A.; Hansen, Paul E.

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 relates to orthopedic casting materials having reduced tack and methods for preparing and using such orthopedic casting materials wherein the materials comprise a nonwoven stretchable, fabric which is impregnated with a curable prepolymer resin. The nonwoven fabric comprises fiber bundles and apertures between the fiber bundles, with each of the fiber bundles comprising a plurality of fibers having interstices therebetween. The curable prepolymer resin is impregnated into the nonwoven fabric such that the interstices between the fibers receive the resin, while leaving the apertures between fiber bundles substantially unoccluded. Such orthopedic casting materials are …

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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

  • Granted May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 11, 1988
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317837 C
Classification (IPC)A61F13/04 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 11, 1988Patent grantedMay 18, 1993Term endedMay 18, 2010

Sources & verification

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