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Expired Canadian patentCanada

Method and apparatus for designing a log home

CA 1255896 A · Owner: Chisum, Finis L. · Inventors: Chisum, Finis L.

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

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Abstract From the Canadian patent

A LOG HOME" Abstract of the Disclosure, In the process of designing a log structure a kit, is provided having a plurality of model logs of different diameters and lengths, having saddle notches and/or end notches, panels for windows, doors, etc. ceiling panels trusses, and so on. A construction board or surface is provided having a rectangular grid of squares laid out to the same scale as the logs and other elements. In designing the structure, the various model building elements are laid out on the construction surface in precisely the same manner that they would be assembled on a floor slab with the full-sized finished logs. Model elements of the precise lengths, etc. are used, so that …

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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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
  • 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 8, 1985
GrantedJune 20, 1989
Term endedJune 20, 2006
Patent numberCA 1255896 A
Classification (IPC)G09B25/04

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedMay 8, 1985Patent grantedJune 20, 1989Term endedJune 20, 2006

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