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Efrain D. Vassallo

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  • Ponce, PR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pipe socket insert
    • Patent number 4,834,430
    • Issue date May 30, 1989
    • Vassallo Research & Development Corp.
    • Efrain D. Vassallo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gasket seating ring
    • Patent number 4,826,028
    • Issue date May 2, 1989
    • Vassallo Research & Development Corp.
    • Efrain D. Vassallo
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Tee pipe fitting
    • Patent number D291480
    • Issue date Aug 18, 1987
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Pipe coupling
    • Patent number D291482
    • Issue date Aug 18, 1987
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Elbow pipe fitting
    • Patent number D291481
    • Issue date Aug 18, 1987
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Cross tee pipe fitting
    • Patent number D291483
    • Issue date Aug 18, 1987
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Gasket
    • Patent number D289078
    • Issue date Mar 31, 1987
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Method for seating a gasket in a plastic pipe bell using a hard con...
    • Patent number 4,625,383
    • Issue date Dec 2, 1986
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Pipe fitting interlocking system
    • Patent number 4,583,772
    • Issue date Apr 22, 1986
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gasket
    • Patent number 4,579,354
    • Issue date Apr 1, 1986
    • Vassallo Research and Development Corporation
    • Efrain D. Vassallo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe fitting construction
    • Patent number 4,474,392
    • Issue date Oct 2, 1984
    • Efrain D. Vassallo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe bell and gasket
    • Patent number 4,343,480
    • Issue date Aug 10, 1982
    • Efrain D. Vassallo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...