Heat recovery system and heat exchanger therefor
CA 2209253 C · Owner: Derksen, William E. · Inventors: Derksen, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat exchanger for use in warming the engine and passenger compartment of a vehicle during cold weather comprises a fluid retaining main body member having a first end a second end, a main longitudinal axis extending from the first end to the second end, and a substantially hollow interior. An inlet and an outlet are mounted on the main body member in fluid communication with the substantially hollow interior adjacent the first end and second end respectively. An exhaust flow passageway having an inlet end and an outlet end in fluid communication one with the other for, in-line connection with a vehicle exhaust system is mounted in the, main body member in throughpassing relation such …
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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 July 4, 1997 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2019.
- 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.