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Milwaukee, WI, US
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Patents Grants
last 30 patents
Information
Patent Grant
Diffuser conduit joint
Patent number
5,714,062
Issue date
Feb 3, 1998
Water Pollution Control Corporation
William W. Winkler
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Direct delivery in-situ diffuser cleaning
Patent number
5,597,491
Issue date
Jan 28, 1997
Water Pollution Control Corporation
William W. Winkler
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Direct delivery in-situ diffuser cleaning
Patent number
5,378,355
Issue date
Jan 3, 1995
Water Pollution Control Corporation
William W. Winkler
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Apparatus for in place gas cleaning of diffusion elements
Patent number
5,328,601
Issue date
Jul 12, 1994
Water Pollution Control Corporation
Frank L. Schmidt
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
In place gas cleaning of diffusion elements
Patent number
RE33177
Issue date
Mar 6, 1990
Water Pollution Control Corporation
Frank L. Schmit
210 - Liquid purification or separation
Information
Patent Grant
In place gas cleaning of diffusion elements
Patent number
4,889,620
Issue date
Dec 26, 1989
Water Pollution Control Corporation
Frank L. Schmit
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Ring channel aeration apparatus and method
Patent number
4,451,373
Issue date
May 29, 1984
Water Pollution Control Corp.
Paul M. Thayer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Swing diffuser
Patent number
4,294,696
Issue date
Oct 13, 1981
Water Pollution Control Corporation
Paul M. Thayer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Sewage aeration system
Patent number
4,288,394
Issue date
Sep 8, 1981
Water Pollution Control Corp.
Lloyd Ewing
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Diffusion element with boundary zone treatment
Patent number
4,288,395
Issue date
Sep 8, 1981
Water Pollution Control Corporation
Lloyd Ewing
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Diffusion element with boundary zone treatment
Patent number
4,261,932
Issue date
Apr 14, 1981
Water Pollution Control Corporation
Lloyd Ewing
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Diffusion element
Patent number
4,261,933
Issue date
Apr 14, 1981
Water Pollution Control Corporation
Lloyd Ewing
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Microscreen method and apparatus
Patent number
4,198,299
Issue date
Apr 15, 1980
Water Pollution Control Corporation
Lloyd Ewing
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Sewage treatment aeration systems
Patent number
4,012,470
Issue date
Mar 15, 1977
Water Pollution Control Corporation
Paul M. Thayer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Filtration method
Patent number
3,979,289
Issue date
Sep 7, 1976
Water Pollution Control Corporation
Michael J. Bykowski
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Sewage treatment aeration systems
Patent number
3,953,553
Issue date
Apr 27, 1976
Water Pollution Control Corporation
Paul M. Thayer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
74147483
Serial number
74147483
Registration number
1709891
Filing date
Mar 14, 1991
WATER POLLUTION CONTROL CORPORATION
11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
Information
Trademark
73818470 - S SANITAIRE
Serial number
73818470
Registration number
1623504
Filing date
Aug 10, 1989
WATER POLLUTION CONTROL CORPORATION
11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
Information
Trademark
73811968 - SANITAIRE
Serial number
73811968
Registration number
1621061
Filing date
Jul 11, 1989
WATER POLLUTION CONTROL CORPORATION
11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes