Expired Canadian patentCanada
A method for the production of an infrastructure channel
CA 2574892 C · Owner: Dupre, Frank · Inventors: Dupre, Frank
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing an infrastructure channel (1) consisting of at least , two segments, (2) of predetermined length with each segment (2) being poured in one piece on the, construction site using in-situ concrete (9) or ready mixed concrete.
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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 25, 2005 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2025.
- 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.
FiledJuly 25, 2005
GrantedSeptember 18, 2012
Term endedJuly 25, 2025
Patent numberCA 2574892 C
Classification (IPC)E21D11/10 +2 more
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.