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Expired Canadian patentCanada

Wall construction and method of construction

CA 1059335 A · Owner: American Volkscastle International · Inventors: Perrin, Arthur

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 wall, including a load bearing wall and method for, constructing it. The wall comprises a core unit or member having a substantial void therein with reticulated sheets of reinforcing material positioned on both sides of the core and spaced therefrom. The wall is formed as by spraying cementitious material through and around the sheet material to produce a composite wall comprising first and second wall slabs of reinforced cementitious material in spaced relation with a hollow core therebetween the, slabs being joined together as a unitary structural member. The core can be most conveniently formed from a line of hollow panels which preferably are made by folding sheets of paperboard.

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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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 31, 1979
Term endedJuly 31, 1996
Patent numberCA 1059335 A
Classification (IPC)E04B2/28 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJuly 31, 1979Term endedJuly 31, 1996

Sources & verification

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