Tubing for walls of boxes for trucks and trailers and a method of use thereof
CA 2097340 C · Owner: Maclellan, Bernard Aloysius · Inventors: Maclellan, Bernard Aloysius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hollow tubing having a generally rectangular cross-section has a longitudinal ridge along a top and a corresponding longitudinal channel along a base. Pieces of tubing can be stacked on top of one another with the ridge of one piece of tubing engaged in the channel of another piece of tubing. The truck or trailer has a peripheral frame and a first piece of tubing is welded to an edge of that frame with the ridge extending upward. Caulking is then placed along the ridge and a second piece of tubing is placed on the first piece so that the ridge of the first piece is located within a channel of the second piece. This method is repeated until a wall of desired size is constructed. Pieces of …
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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 May 31, 1993 and granted June 10, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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.
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.