System and method for recovery of waste heat from pipelines
CA 2220890 A1 · Owner: Crossman, William Herbert · Inventors: Crossman, William Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Natural gas pipelines typically employ an underground large diameter pipe on , the order of about, 42 inches in diameter to conduct natural gas from a gas field to a place of consumption or to a, shipping terminal Compressor stations disposed along the pipeline compress the gas to maintain, an acceptable rate of flow along the line. Compressing process heats the gas in the pipeline, and, the heat is gradually lost to the ground along the length of the line. The present invention, discloses a system and method for the recovery of such waste heat from a pipeline in which one, or more recovery tubes or coils disposed underground above or alongside the pipeline, carries a, heat transfer …
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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 January 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2020.
- 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.