TREA

Douglas H. Eden

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  • Harmony, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air grid for underdrains and similar systems
    • Patent number 5,673,481
    • Issue date Oct 7, 1997
    • RF Delaware, Inc.
    • R. Lee Roberts
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Air grid for underdrains and similar systems
    • Patent number 5,534,202
    • Issue date Jul 9, 1996
    • Roberts Filter Manufacturing Company
    • R. Lee Roberts
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Lateral underdrain
    • Patent number 5,413,710
    • Issue date May 9, 1995
    • Roberts Filter Manufacturing Company
    • R. Lee Roberts
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Rotary agitator
    • Patent number 5,061,080
    • Issue date Oct 29, 1991
    • Roberts Filter Manufacturing Company
    • Donald J. MacKay
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Filter employing barrier
    • Patent number 4,750,999
    • Issue date Jun 14, 1988
    • Roberts Filter Manufacturing Company
    • Robert L. Roberts
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL