Robert J. Steffan

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Newtown Bucks, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Biodegradation of gasoline oxygenates
- Patent number 6,524,842
- Issue date Feb 25, 2003
- Envirogen, Inc.
- Simon Vainberg
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Biodegradation of the gasoline oxygenates
- Patent number 6,303,366
- Issue date Oct 16, 2001
- Envirogen, Inc.
- Robert Jon Steffan
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Biological conversion of organic compounds
- Patent number 5,958,757
- Issue date Sep 28, 1999
- Envirogen, Inc.
- Robert Jon Steffan
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Biodegradation of the gasoline oxygenates
- Patent number 5,814,514
- Issue date Sep 29, 1998
- Envirogen, Inc.
- Robert Jon Steffan
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Method of degrading volatile organochlorides and remediation thereof
- Patent number 5,512,479
- Issue date Apr 30, 1996
- Envirogen, Inc.
- Robert J. Steffan
- B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information Patent Grant
Methods for treating toxic material
- Patent number 5,439,590
- Issue date Aug 8, 1995
- Envirogen, Inc.
- Robert J. Steffan
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE