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Expired Canadian patentCanada

Permanent non-removable insulating type concrete wall forming structure

CA 1314727 C · Owner: Young, David Arthur · Inventors: Young, David Arthur

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 modular synthetic plastic concrete form structure which comprises a pair of modular concrete impervious forming panels each comprised of a series of modular concrete forming sections stacked on top on one another and also disposed in end-to-end relation. The sections each having means or its upper and lower edges and its opposite vertical edges for interlocking the sections in engagement with one another The panels each being comprised of a synthetic plastic end the panels are positioned in spaced opposed relation. The slots are provided in the opposed sections positioned in longitudinally spaced relation along the upper and lower edges. Synthetic plastic ties are provided with each …

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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 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 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.
FiledMay 2, 1986
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314727 C
Classification (IPC)E04B2/00 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 2, 1986Patent grantedMarch 23, 1993Term endedMarch 23, 2010

Sources & verification

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