David DiGregorio

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Salt Lake City, UT, US

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Patents Grantslast 30 patents

Information Patent Grant
Two-phase orbital-type wastewater treatment system and method
- Patent number 5,234,595
- Issue date Aug 10, 1993
- Baker Hughes Incorporated
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Clarifier cleaning apparatus
- Patent number 5,078,869
- Issue date Jan 7, 1992
- Baker Hughes Incorporated
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Aerobic waste sludge digester-thickener orbital system and method
- Patent number 4,940,545
- Issue date Jul 10, 1990
- Baker Hughes, Inc.
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Intrachannel clarifier
- Patent number 4,936,982
- Issue date Jun 26, 1990
- Baker Hughes, Inc.
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Orbital wastewater treatment system with combined surface aerator a...
- Patent number 4,869,818
- Issue date Sep 26, 1989
- Baker International Corporation
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Gas-liquid dissolving tank
- Patent number 4,275,020
- Issue date Jun 23, 1981
- Envirotech Corporation
- David DiGregorio
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE