TREA

John A. Sheaffer

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  • Norwalk, CT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rotary vacuum disc filter
    • Patent number 4,207,190
    • Issue date Jun 10, 1980
    • Dorr-Oliver Incorporated
    • John A. Sheaffer
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Endless filter belt
    • Patent number 3,965,011
    • Issue date Jun 22, 1976
    • Dorr-Oliver Incorporated
    • John A. Sheaffer
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL