Rail car bridge plate
CA 2136168 C · Owner: Bullock, Robert L. · Inventors: Bullock, Bruce M.; Drew, Dallas Satterlee; Bullock, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bridge plate assembly for use in moving vehicles between rail cars for unloading and loading has a sufficient length to span the space between adjacent rail cars and has sufficient width to accommodate vehicles of varying wheelbase. The plate assembly includes two load bearing plate members positioned one on top of another, with one end of each plate member being formed and adapted to be attached to the end of a rail car. Each plate member has top and bottom face layers bonded to an intermediate low density core.
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 November 18, 1994 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.