Oilsands tailings heat exchanger
CA 2230035 A1 · Owner: Lane, Stephen J. · Inventors: Lane, Stephen J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy recovery system for an oilsands plant. A heat exchanger is connected to a source of hot coarse tailings from the oilsands plant. The heat exchanger is provided by an inner pipe, surrounded by an outer pipe which together form an annulus, with fins extending from the outer pipe into the annulus. The inner pipe has an unobstructed interior bore. The outer pipe is preferably spaced from the inner pipe by the fins. Cold water is flowed into the annulus from an inlet to a hot water outlet, preferably at opposed ends of the heat exchanger with flow in the annulus countercurrent to flow in the inner pipe. The interior surface of the inner pipe is preferably coated with abrasion resistant …
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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 February 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 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.