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Expired Canadian patentCanada

Reinforced laminated timber

CA 1307731 C · Owner: Eaton, Robert D. · Inventors: Eaton, Robert D.; Gardner, Guy P.

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

Composite structural timber which is reinforced with deformed metal bars. The timber comprises a plurality of wooden laminations bonded together by a resin adhesive. There are at least two longitudinally extending metal bars. One bar is located near one longitudinal edge of the timber and the other is located near the other longitudinal edge. The composite structure provides superior load carrying capacity and reduction in deflection under a given load. The main use is as structural timber beams and posts.

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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.
FiledNovember 9, 1988
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307731 C
Classification (IPC)E04C3/29 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 9, 1988Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

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