Hoppers
CA 1237603 A · Owner: Rotaque (Proprietary) Limited · Inventors: Du Plessis, Gysbert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bottom discharge hopper rail car is disclosed which has a chassis on flanged wheels, a hopper body mounted on the chassis and including transversely and longitudinally extending edges which border a discharge opening from the body. The opening is wholly or substantially wholly at a level below the tops of the wheels but above the bottoms of the wheels and at least partly between pairs of the flanged wheels. The longitudinally extending edges may be at the lower region of a pair of downwardly converging laterally spaced side walls which are asymmetrical with respect to a longitudinal vertical plane passing centrally between the wheels.
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
- Granted June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- 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.