Dennis Helfritch

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Baltimore, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for enhancing collection efficiency and providing surface st...
- Patent number 6,245,126
- Issue date Jun 12, 2001
- Enviromental Elements Corp.
- Paul L. Feldman
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Air filter with combined enhanced collection efficiency and surface...
- Patent number 6,245,132
- Issue date Jun 12, 2001
- Environmental Elements Corp.
- Paul L. Feldman
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Catalytic reactor for oxidizing mercury vapor
- Patent number 5,785,932
- Issue date Jul 28, 1998
- Environmental Elements Corp.
- Dennis J. Helfritch
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Electron beam flue gas scrubbing treatment
- Patent number 5,695,616
- Issue date Dec 9, 1997
- Virginia Accelerators Corporation
- Dennis Helfritch
- C01 - INORGANIC CHEMISTRY