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Expired Canadian patentCanada

Framework structure for wooden building and framework member

CA 2091808 C · Owner: Kabushiki Kaisha Metal Fit · Inventors: Kato, Masao

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 base end of a hook plate is simply inserted into a column surface of a columnar receiving member for fixing. A hook of the hook plate is inserted into an inserted groove provided in an end of a crossing member such as a girder. Further a bolt passing through the crossing member is received by the hook. As a result, a framework of the receiving member and the crossing member can be fixed. Alternatively hook plates each having a circular outer periphery and provided in the hooked form are respectively inserted into inserted grooves provided in a receiving member and a crossing member. The respective hook plates are fixed by bolts so as to build a framework.

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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

  • Filed March 17, 1993 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 17, 1993
GrantedDecember 7, 1999
Term endedMarch 17, 2013
Patent numberCA 2091808 C
Classification (IPC)E04C3/00 +1 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedMarch 17, 1993Patent grantedDec 7, 1999Term endedMarch 17, 2013

Sources & verification

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