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Expired Canadian patentCanada

Combination ladders, ladder components and methods of manufacturing same

CA 2714075 C · Owner: Bowers, Jack W. · Inventors: Moss, Newell Ryan; Francis, David; Bowers, Jack W.

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

Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably couple to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally ladder …

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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 November 11, 2003 and granted March 11, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 11, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 11, 2025.
  • 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 11, 2003
GrantedMarch 11, 2014
Term endedNovember 11, 2023
Patent numberCA 2714075 C
Classification (IPC)E06C1/22 +2 more

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedNov 11, 2003Patent grantedMarch 11, 2014Term endedNov 11, 2023

Sources & verification

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