TREA

Donald Leonard DeVack

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  • Norwalk, CT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    External loop nonfreezing heat exchanger
    • Patent number 6,622,496
    • Issue date Sep 23, 2003
    • Praxair Technology, Inc.
    • Alan Tat Yan Cheng
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Nonfreezing heat exchanger
    • Patent number 5,937,656
    • Issue date Aug 17, 1999
    • Praxair Technology, Inc.
    • Alan Tat Yan Cheng
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
  • Information Patent Grant

    Cryogenic cooling tower
    • Patent number 5,802,858
    • Issue date Sep 8, 1998
    • Praxair Technology, Inc.
    • Alan Tat Yan Cheng
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Cryogenic cold shelf
    • Patent number 5,701,745
    • Issue date Dec 30, 1997
    • Praxair Technology, Inc.
    • Alan Tat Yan Cheng
    • F26 - DRYING
  • Information Patent Grant

    Droplet freezing method and apparatus
    • Patent number 4,848,094
    • Issue date Jul 18, 1989
    • Union Carbide Corporation
    • Robert B. Davis
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

  • Information Patent Application

    External loop nonfreezing heat exchanger
    • Publication number 20030101736
    • Publication date Jun 5, 2003
    • Alan Tat Yan Cheng
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...