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Expired Canadian patentCanada

Insulating non-removable type concrete wall forming structure and device and system for attaching wall coverings thereto

CA 1286517 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 synthetic plastic concrete wall tie comprising a pair of triangular truss sections disposed in end-to-end relation, an intermediate web section joining the truss sections at the apexes of triangles of the triangular truss sections, and T-shaped end sections at opposite ends of the tie with each end section being formed integral with its stem joined with the associated triangular truss section the, cross piece of each T-shaped end section comprising means for anchoring the tie to a slotted wall section when assembled therewith. The tie is usable with modular foamed plastic concrete form structure having a pair of modular concrete forming panels. The panels are comprised of a series of …

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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 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 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.
FiledMay 2, 1986
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286517 C
Classification (IPC)E04B1/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 2, 1986Patent grantedJuly 23, 1991Term endedJuly 23, 2008

Sources & verification

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