Trailer construction
CA 2110534 C · Owner: Thomas, Michael Irvin · Inventors: Thomas, Michael Irvin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Two parallel main steel beams extend from front to rear of a trailer which beams terminate at their upper web edges with aligned aluminum-extruded H-shaped beams having a depending leg which is bolted to a steel beam web. A plurality of aluminum-extruded upper floor sections including a floor member and depending beams are interlocked and welded to one another at their edges to form a floor assembly. Side rails extend from front to rear of the trailer and have an upper leg interlocked with and welded to the upper floor assembly. A lower side rail leg is glued into a bottom aluminum sheet skin member. A rigid polyurethane foam layer is within each of the volumes formed by the bottom skin …
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
- Filed December 2, 1993 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 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.