Plate type heat transfer device
CA 2134086 C · Owner: Lee, Yung · Inventors: Park, Hern J.; Lee, Yung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a plate type heat transfer device which has a number of rectangular or oval cavities (or cells) in its cross-section, charged with a certain amount of a working fluid in each of the cavities (or cells) where heat from the lower surface of the plate is transferred to the upper surface of the heat transfer device. Therefore the plate type heat transferred, device has a wide range of application such as for the stabilization or protection of foundation for pipelines roads, airport, run-way, structures etc. by keeping the foundation intact in extremely cold regions or to the ceilings or floors of relatively large spaces, such as office buildings, manufacturing …
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 21, 1993 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2015.
- 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.