Apparatus and method for vaporizing a liquid cryogen and superheating the resulting vapor
CA 2190694 C · Owner: Sheridan, Roger D. · Inventors: Viegas, Herman H.; Aronov, Michael A.; Ellingson, Bradley G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Both an apparatus and method are provided for vaporizing a liquid cryogen and super heating the resulting vapor into a heated gas. The apparatus includes a combustion-type heat source which may burn a fuel such as propane that generates water-containing combustion gases and a, vaporizer coil having an inlet conduit for receiving a flow of a liquid cryogen, such as liquid carbon dioxide and an outlet conduit for expelling, vaporized cryogen. An annular casing surrounds but is spaced apart from the vaporizer coil. The casing isolates the vaporizer coil from contact with water-containing combustion gases generated by the heat source thereby, preventing the formation of unwanted water and ice …
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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 19, 1996 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2018.
- 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
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.