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Expired Canadian patentCanada

Method and apparatus of cryogenic cooling for high temperature superconductor devices

CA 2528175 C · Owner: Superpower, Incorporated · Inventors: Mine, Susumu; Yuan, Xing

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Abstract From the Canadian patent

A method and apparatus for providing cryogenic cooling to HTS devices (24) in , particular those that are used in high-voltage electric power applications. The method involves pressurizing liquid cryogen (46 48) to above one , atmospheric pressure to improve its dielectric strength while sub-cooling the , liquid cryogen to below its saturation temperature in order to improve the performance of the HTS components (24) of the device. An apparatus (10) utilizing such a cooling method consists of a vessel that contains a pressurized gaseous cryogen region (44) and a sub-cooled liquid cryogen bath a liquid cryogen heating (52) coupled with a gaseous cryogen venting scheme (30) to maintain …

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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 June 15, 2004 and granted March 6, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 15, 2004
GrantedMarch 6, 2012
Term endedJune 15, 2024
Patent numberCA 2528175 C
Classification (IPC)F25B19/00 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedJune 15, 2004Patent grantedMarch 6, 2012Term endedJune 15, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.