TREA

Ralph G. Portis

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  • Highland Park, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Handles for bottom outlet valve assembly
    • Patent number 6,213,449
    • Issue date Apr 10, 2001
    • Delaware Capital Formation, Inc.
    • Ralph G. Portis
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Switch level control for tank ullage determining system
    • Patent number 5,886,312
    • Issue date Mar 23, 1999
    • Midland Manufacturing Corp.
    • Gaston C. Barmore
    • G01 - MEASURING TESTING
  • Information Patent Grant

    T-fitting
    • Patent number 5,269,342
    • Issue date Dec 14, 1993
    • Midland Manufacturing Corp.
    • Ralph G. Portis
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Powered actuator for valve
    • Patent number 5,257,771
    • Issue date Nov 2, 1993
    • Midland Manufacturing Corp.
    • Ralph G. Portis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Joint seal between valve body and removable port
    • Patent number 5,131,694
    • Issue date Jul 21, 1992
    • Midland Manufacturing Corp.
    • Ralph G. Portis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Protective device for mobile tanks having bottom discontinuities
    • Patent number 4,461,397
    • Issue date Jul 24, 1984
    • Midland Manufacturing Corp.
    • Ralph G. Portis
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL