Gas liquefaction method and apparatus
CA 1298541 C · Owner: The Boc Group, Inc. · Inventors: Gates, Robert G.
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 the liquefaction of a permanent gas comprising nitrogen. The temperature of the permanent gas stream at a pressure in the range of to 90 atmospheres is reduced to below its initial temperature. Providing at least part of the necessary refrigeration, a single nitrogen working fluid cycle is performed in which the nitrogen working fluid is compressed to a pressure in the range of 75 to 90 atmospheres, cooled to a temperature in the range of 170 to 200 K, work expanded to a temperature in the range of 107 to 120 K, and warmed by heat exchange countercurrently to the permanent gas stream, thereby providing refrigeration for the stream.
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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
- Granted April 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 2009.
- 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.