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John T. Harvell

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  • Sudbury, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cryopump temperature control of arrays
    • Patent number 7,155,919
    • Issue date Jan 2, 2007
    • Brooks Automation, Inc.
    • Peter W. Gaudet
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Electronically controlled cryopump
    • Patent number 5,157,928
    • Issue date Oct 27, 1992
    • Helix Technology Corporation
    • Peter W. Gaudet
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Cryopump with improved second stage passageway
    • Patent number 5,156,007
    • Issue date Oct 20, 1992
    • Helix Technology Corporation
    • Allen J. Bartlett
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Electronically controlled cryopump
    • Patent number 4,918,930
    • Issue date Apr 24, 1990
    • Helix Technology Corporation
    • Peter W. Gaudet
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum system with molecular flow line
    • Patent number 4,860,546
    • Issue date Aug 29, 1989
    • Helix Technology Corporation
    • John T. Harvell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Stacked disc heat exchanger for refrigerator cold finger
    • Patent number 4,259,844
    • Issue date Apr 7, 1981
    • Helix Technology Corporation
    • Domenico S. Sarcia
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...

Patents Applicationslast 30 patents

  • Information Patent Application

    Cryopump temperature control of arrays
    • Publication number 20050081536
    • Publication date Apr 21, 2005
    • Helix Technology Corporation
    • Peter W. Gaudet
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Electronically controlled vacuum pump gauge
    • Publication number 20040194477
    • Publication date Oct 7, 2004
    • Helix Technology Corporation
    • Peter W. Gaudet
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...