Railroad highway crossing cantilever having inverted t-truss design
CA 2180610 C · Owner: Boget, Paul J. · Inventors: Defrancesco, Santo A.; Boget, Paul J.; Barrios, Richard C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A supporting truss for use in a railroad cantilever signal structure in which the, cantilever signal structure has an elongated vertical mast that is secured to the ground at one end and has an arm assembly extending outward from the mast at an opposite end. The truss has an upper longitudinal beam that is secured at one end to and extends outward substantially perpendicular from the mast. The truss also has first and second lower longitudinal beams that extend outward from and are secured at respective first ends to the mast. The first and second longitudinal beams are spacedly positioned below the upper longitudinal beam and are parallel, to one another and are perpendicular to the mast. …
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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 July 5, 1996 and granted October 20, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2018.
- 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.