DH

Dennis J. Helfritch

RE Research-Cottrell: 5 patents #1 of 37Top 3%
UC US Dept of Commerce: 3 patents #104 of 1,030Top 15%
SR South Dakota Board Of Regents: 3 patents #17 of 155Top 15%
EE Environmental Elements: 2 patents #6 of 31Top 20%
AI American Precision Industries: 1 patents #12 of 26Top 50%
Overall (All Time): #369,058 of 4,157,543Top 9%
13
Patents All Time

Issued Patents All Time

Showing 1–13 of 13 patents

Patent #TitleCo-InventorsDate
11998942 Cold spray device and system Christian Widener, Victor Champagne, Matthew Trexler, Rob Hrabe 2024-06-04
11292019 Cold spray device and system Christian Widener, Victor Champagne, Matthew Trexler, Rob Hrabe 2022-04-05
10441962 Cold spray device and system Christian Widener, Victor Champagne, Matthew Trexler, Rob Hrabe 2019-10-15
6245132 Air filter with combined enhanced collection efficiency and surface sterilization Paul L. Feldman 2001-06-12
6245126 Method for enhancing collection efficiency and providing surface sterilization of an air filter Paul L. Feldman 2001-06-12
5785932 Catalytic reactor for oxidizing mercury vapor 1998-07-28
5695616 Electron beam flue gas scrubbing treatment Ralph D. Genuario 1997-12-09
5213780 Method for nitrogen oxide reduction and flue gas reheating 1993-05-25
4985219 Removal of nitrogen oxides from waste gases Philip Efthimion 1991-01-15
4960445 Process for removing SO.sub.2 and fly ash from flue gas 1990-10-02
4883570 Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves Philip Efthimion 1989-11-28
4832806 Radiation for the selective destruction of toxic molecules on solid surfaces 1989-05-23
4357151 Electrostatically augmented cartridge type dust collector and method Edward J. Gonas 1982-11-02