Process of electric pipeline heating
CA 2049907 C · Owner: Petroleo Brasileiro S.A. - Petrobras · Inventors: De Castro Goncalves, Carlos Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process to clear pipelines carrying fluids viscous and/or rich in organic residues utilizing heat, generation through electric phenomena whether or not, combined with the injection of special fluids. The heating process of this invention includes basically the introduction of a heating element inside. a pipeline carrying fluids viscous and/or rich in organic residues through a coupling spool which is intercalated in said fluid-carrying pipeline, simultaneously applying to said heating element an electric current, so that the heat generated by said heating element is transmitted to the viscous fluid or to the compacted residual mass inside the fluid-carrying pipeline, causing the …
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 August 26, 1991 and granted October 25, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2013.
- 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.