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Expired Canadian patentCanada

Lattice with interlocking dovetails

CA 1298059 C · Owner: Pettit, Frederick M. · Inventors: Pettit, Frederick M.

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

A lattice consisting of first and second flexible resilient criss-crossed strips each having beveled edges and mating dovetail cutouts oriented in face-to-face relationship with the dovetail cutouts of each of the strips having dovetail sides engaging the beveled edges of the other of the strips. A lattice with criss-crossed strips with one strip having dovetail cutouts with sides which engage mating beveled edges of the other strip. Lattice structures of the foregoing types which utilize hollow strips.

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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 March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
  • 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 9, 1988
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298059 C
Classification (IPC)E04C2/42

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 9, 1988Patent grantedMarch 31, 1992Term endedMarch 31, 2009

Sources & verification

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