Telescopic column for a portable stage roof and corresponding column structure
CA 2126635 C · Owner: Inter-Scenes Inc. · Inventors: Toutant, Daniel; Chouinard, Marius; Miron, Yvan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The telescopic column is provided for a portable stage used in outdoor or indoor events produced in front of audiences or the like and comprising a haulable chassis for overland transportation between events. The column bears a roof movable vertically above the chassis and comprises a plurality of C-shaped beams operatively fitted into each other and concentric with a central beam. A plurality of pairs of upper rollers each operatively connected to an upper end of a corresponding C-shaped beam are provided for engagement with the surface of an adjacent interior beam and for rolling thereon upon raising or lowering of the roof. The use of rollers prevents jamming of the C-shaped beams when …
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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 June 23, 1994 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2016.
- 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.