Articulated platform car for three or four trailers
CA 2006605 C · Owner: Keating, Bruce E. · Inventors: Halliar, William R.; Keating, Bruce E.; Yeates, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An articulated railroad flat car for transporting four short or three long semi-trailers comprises two units connected by a drawbar. A plurality of semi-trailer hitches are mounted on the units. The hitches are suitably spaced for securing either three long trailers or four standard trailers using overhead, loading or circus loading. When three long trailers are loaded the middle trailer is attached to a hitch on one of the units and has its tandem resting on the other unit. The unit on which the tandem rests has a widened floor section at its end adjacent the drawbar to accommodate turning or skewing of the tandem when the car negotiates a curve.
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 22, 1989 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 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.