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Expired Canadian patentCanada

Railroad hopper car outlet gate end tube assemblies

CA 2029947 C · Owner: Trinity Industries, Inc. · Inventors: Fritz, William E.; Pankow, James C.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An end tube assembly for the outlet gate of a railroad hopper car includes an end tube and an end tube cap for closing the end tube. The cap is pivotally connected to the end tube and there is a diammetrically opposed latch between the cap and end tube. The cap has a guide which extends toward and over the end tube and there is a ramp on the end tube in alignment with the guide to coaxially direct the guide and cap on the end tube during closure. There is a lock on the end tube adjacent the ramp to prevent relative circumferential movement between the cap and end tube. The end tube mounts a gasket which faces the end tube cap. The cap has a rim extending outwardly therefrom for contact with …

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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 November 14, 1990 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1990
GrantedMay 30, 2000
Term endedNovember 14, 2010
Patent numberCA 2029947 C
Classification (IPC)B61D7/00 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedNov 14, 1990Patent grantedMay 30, 2000Term endedNov 14, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.