Method and apparatus for bending composite reinforced pipe
CA 2455536 C · Owner: Fawley, Norman C. · Inventors: Fawley, Norman C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction heater is used to heat composite reinforced pipe (CRP) prior to a bending operation. By heating the composite reinforcement to approximately 90° , F-110° F, the incidence of circumferential stress cracks in the resin is significantly, reduced. Resin cracking is also reduced by incorporating longitudinal fibers in the , composite reinforcement during manufacture of CRP.
Read the whole patent
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 January 22, 2004 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 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
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.