TREA

Thomas J. Vollstedt

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  • Weston, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Wastewater treatment system
    • Patent number 7,678,268
    • Issue date Mar 16, 2010
    • Siemens Water Technologies Corp.
    • Duane R. Smith
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Treatment of highly colored wastewaters
    • Patent number 5,302,288
    • Issue date Apr 12, 1994
    • Zimpro Environmental, Inc.
    • John A. Meidl
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Two-stage anaerobic/aerobic treatment process
    • Patent number 4,919,815
    • Issue date Apr 24, 1990
    • Zimpro/Passavant Inc.
    • William M. Copa
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Two-stage batch wastewater treatment
    • Patent number 4,897,196
    • Issue date Jan 30, 1990
    • Zimpro/Passavant Inc.
    • William M. Copa
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Two-stage wastewater treatment
    • Patent number 4,810,386
    • Issue date Mar 7, 1989
    • Zimpro/Passavant Inc.
    • William M. Copa
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Blowdown pot for a reactor
    • Patent number 4,620,563
    • Issue date Nov 4, 1986
    • Zimpro Inc.
    • John A. Meidl
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Filter cleaning method
    • Patent number 3,932,278
    • Issue date Jan 13, 1976
    • Sterling Drug Inc.
    • John A. Meidl
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    WASTEWATER TREATMENT SYSTEM AND METHOD
    • Publication number 20070209999
    • Publication date Sep 13, 2007
    • SIEMENS WATER TECHNOLOGIES CORP.
    • Duane R. Smith
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE