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Expired Canadian patentCanada

Method for compressing a low temperature high density liquid gas

CA 1212309 A · Owner: Air Products And Chemicals, Inc. · Inventors: Schuck, Thomas W.

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention provides a method for compressing a low temperature high density liquid gas, for example helium. The, method comprises the steps of: withdrawing and transferring the fluid from a storage receptacle to the accumulator of the first inlet of a two stage compressor; compressing the fluid in the first stage to a pressure intermediate that of the storage receptacle and the final pressure at the point of delivery of the fluid; transferring the pressurized fluid from the first stage to a second stage permitting warming of the fluid during transfer and compressing the fluid to the pressure required at the point of delivery; and heat exchanging and warming the fluid exiting the second …

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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 October 7, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 17, 1983
GrantedOctober 7, 1986
Term endedOctober 7, 2003
Patent numberCA 1212309 A
Classification (IPC)F25J3/04 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 17, 1983Patent grantedOct 7, 1986Term endedOct 7, 2003

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