TREA

Thomas C. Piotrowski

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  • West Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum breaker arrangement with externally protruding collapsible v...
    • Patent number 8,317,049
    • Issue date Nov 27, 2012
    • The Protectoseal Company
    • Thomas C. Piotrowski
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Gauge hatch with liquid seal
    • Patent number 6,629,621
    • Issue date Oct 7, 2003
    • The Protectoseal Company
    • Thomas C. Piotrowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gauge hatch with diaphragm and liquid seal
    • Patent number 6,244,457
    • Issue date Jun 12, 2001
    • The Protectoseal Company
    • Thomas C. Piotrowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vent valve with liquid seal
    • Patent number 6,056,005
    • Issue date May 2, 2000
    • The Protectoseal Company
    • Thomas C. Piotrowski
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tank blanketing valve
    • Patent number 5,660,204
    • Issue date Aug 26, 1997
    • The Protectoseal Company
    • Thomas C. Piotrowski
    • F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS

Patents Applicationslast 30 patents

  • Information Patent Application

    Vacuum breaker arrangement
    • Publication number 20070138189
    • Publication date Jun 21, 2007
    • Thomas C. Piotrowski
    • B60 - VEHICLES IN GENERAL