Bottom discharge hopper structures
CA 1096239 A · Owner: Rotaque (Proprietary) Limited · Inventors: Brouwer, Cornelis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hopper car in which the body has vertical end walls and side walls each comprising a sloping lower portion and a ver-tical upper portion. The two sloping lower portions converge downwardly and their horizontal lower edges define a discharge opening. One of these edges lies in a horizontal plane which is at a different level to the plane containing the other lower edge. The angle of slope of one lower portion is different to the angle of slope of the other lower portion. Additionally the horizontal plane containing the line of convergence between said one lower portion and its associated upper portion lies in a different horizontal plane to the corresponding line of convergence of the …
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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
- Granted February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 1998.
- 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.