Method for removal of permeate gases from a flexible tubular pipe and pipe adapted for carrying out the same
CA 2535363 C · Owner: Felix-Henry, Antoine · Inventors: Felix-Henry, Antoine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the drainage of permeate gases from a flexible tubular pipe and a pipe embodied for carrying out said method. The pipe comprises at least one inner pressure sleeve (14) for the transport of hydrocarbons, which contain permeate gases which diffuse across the wall of the inner pressure sleeve (14). The pipe has an outer sleeve (24) and several reinforcement layers (16 18, 20), arranged in an annular zone (23) between said outer sleeve (24) and said inner pressure sleeve (14). Said annular zone (23) has transport ducts in which the permeate gases can circulate towards the removal means. The method comprises a forced circulation of the permeate gases in …
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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 August 6, 2004 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2026.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.