Liquefaction of high pressure gas
CA 1100031 A · Owner: Phillips Petroleum Company · Inventors: Martin, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A process for liquefying a gas at a pipeline pressure of above about 650 psia and at ambient temperature, in which the gas is cooled to sequentially lower temperatures, by passing the gas through a plurality of cooling stages in indirect heat exchange with at least one refrigerant and near its liquefaction temperature, the cooled gas is expanded to a lower pressure the expanded gas is, further cooled to its liquefaction temperature using indirect heat exchange, with an expanded refrigerant the liquefied gas is expanded to atmospheric pressure for storage or transport, by passing the liquefied gas through at least one expansion stage and vapors collected from the …
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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 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- 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.