David S. Ross

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Lorain, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Underdrain for granular medium filter
- Patent number 5,089,147
- Issue date Feb 18, 1992
- Zimpro Passavant Environmental Systems, Inc.
- David S. Ross
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Pulsing portions of a filter cell to extend a filter run
- Patent number 4,976,873
- Issue date Dec 11, 1990
- Zimpro/Passavant Inc.
- David S. Ross
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Slime control for primary filtration systems
- Patent number 4,818,414
- Issue date Apr 4, 1989
- Zimpro/Passavant Inc.
- David S. Ross
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Apparatus and method of filtering solids from a liquid effluent
- Patent number 4,627,923
- Issue date Dec 9, 1986
- International Tectonics Incorporated
- David S. Ross
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Removal of grease and oil from particulate bed granules by backwash...
- Patent number 4,032,443
- Issue date Jun 28, 1977
- Sterling Drug Inc.
- David S. Ross
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL