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Expired Canadian patentCanada

Formable fiber composite

CA 1283344 C · Owner: Johnston, Jon · Inventors: Smith, Gerald J.; Ellis, Paul; Campbell, Brian

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

A composite structural material and a method of making it, which material is thermoformable and capable of being rigidified by application of a resin, and which is useful in certain electronics applications because of a metallic layer incorporated within the structure. A layer of a selected metal is needle punched onto a fibrous batt of selected synthetic thermoplastic fibers, which is then thermoformed to a desired shape and rigidified by contacting with and being embedded in, a, suitable resin. Specific applications of the use of this composite include a parabolic dish-shaped antenna an, electromagnetic interference shield for electronic equipment and, a radioactive emission shield.

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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 April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2008.
  • 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 16, 1987
GrantedApril 23, 1991
Term endedApril 23, 2008
Patent numberCA 1283344 C
Classification (IPC)B32B5/06 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJuly 16, 1987Patent grantedApril 23, 1991Term endedApril 23, 2008

Sources & verification

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