Segmented arch structure
CA 1329971 C · Owner: Quaile, Allan T. · Inventors: Quaile, Allan T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A segmented arch structure is prefabricated from compression units, the units generally comprising one or more standard arch segment elements, and end anchor elements. Each arch segment comprises a trapezoidal frame structure fabricated from short lengths of sawn lumber and fastened at, the corner junctions of the respective individual members to form the respective arch segment element each element, comprising a segment of the arch. The arch is assembled in combination with one or more elongated pre-stressing elements and the pre-stressing elements tensioned to a sufficient extent, relative to the geometry and applied load to be born by the arch, that, in combination with other …
Read the whole patent
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 7, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.