Rail road hopper car fittings and method of operation
CA 2846302 C · Owner: National Steel Car Limited · Inventors: Khattab, Mohamed A.; Forbes, James W.; Davis, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hopper car discharge section may be wide at the top and narrow at the bottom. Outflow , is controlled by closure members at least one of which is movable. The closure members come , together to a closed condition or position for retaining lading. When apart in an open position or , condition, lading may be discharged. A seal member or seal member assembly is mounted to one , or both of the closure members. When open the seal member or seal member , assembly lies substantially flush with, or shy of, the slope of the surface of the closure member. When closed, the seal member may be self-energizing in the sense that as lading is added , the seal may tend to seal more tightly. The seal …
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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
- Filed September 8, 2006 and granted March 15, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.