Composite pipe, method of formation, tool to perform method, and use of pipe
CA 2438151 C · Owner: Trivelli, Enrique · Inventors: Trivelli, Enrique
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Composite pipe formed by a metallic pipe with inner lining of plastic material resistant to corroding agents the inner lining formed by a prefabricated plastic material lamina curved to tubular shape to adapt it to the inner surface of the metallic pipe its longitudinal edges abutting or separated by a small width joint. The curved lamina is placed inside the metallic pipe adhered to its inner surface filling the joint between its longitudinal edges with a filler compatible with the plastic material of the lamina and the material of the metallic pipe and resistant to the fluids to be conveyed through the composite pipe. Also a method to manufacture said composite pipe compris ing placing …
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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 25, 2003 and granted July 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2025.
- 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.