Heat exchanger and installation for extracting heat from waste water
CA 2565142 C · Owner: Lyonnaise Des Eaux · Inventors: Studer, Urs
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The heat exchanger system for extracting heat from waste water comprises a surface , area (5, 11, 21) made of copper of a copper alloy or of a copper compound. The area of , these surface areas amounts to solely a fraction of the heat exchanger surface area. In , that waste water flows over the surface areas the formation of a sewer , biofilm on the heat exchanger surface is prevented or stopped. Preferably the surface areas , are formed , by the surfaces of bands of copper of a copper alloy or of a copper compound extending essentially in a direction transverse to the direction of flow.
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 April 29, 2005 and granted October 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.