Air conditioning and refrigeration apparatus utilizing a cryogen
CA 2110106 C · Owner: Viegas, Herman Hermogio · Inventors: Viegas, Herman Hermogio; Roehrich, Roland Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and apparatus for controlling a conditioned space to a predetermined set point temperature utilizing a supply of cryogen. Cryogen is drawn from the supply in a flow path to provide a cooling made via a heat exchanger disposed in the flow path. A vapor motor in the flow path, downstream from the heat exchanger drives a fan, which moves air between the conditioned space and the heat exchanger. Heat is applied to the cryogen downstream from the heat exchanger, after all cooling modes have been performed, to provide the desired fan horsepower without, interfering with a coating cycle. A by-pass flow path selectively directs cryogen directly to the vapor motor by-passing the heat …
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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 November 26, 1993 and granted January 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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.