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Expired Canadian patentCanada

Structural connection for cavity wall construction

CA 1164237 A · Owner: Hastings, Bruce A. A Partnership · Inventors: Aziz, Edward M.; Gulow, Robert

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

One common type of masonry wall is called a cavity wall which is composed of two wythes. This invention relates to a system for structurally connecting the two wythes together by the use of a mortise and tenon arrangement and for a particular type of connector.

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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 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 5, 1981
GrantedMarch 27, 1984
Term endedMarch 27, 2001
Patent numberCA 1164237 A
Classification (IPC)E04B2/30

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedJan 5, 1981Patent grantedMarch 27, 1984Term endedMarch 27, 2001

Sources & verification

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