1
Philip C Efthimion, Dennis J Helfritch: Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves. Research Cottrell, Kerkam Stowell Kondracki & Clarke, November 28, 1989: US04883570 (57 worldwide citation)

An apparatus and method for creating high temperature plasmas for enhanced chemical processing of gaseous fluids, toxic chemicals, and the like, at a wide range of pressures, especially at atmospheric and high pressures includes an electro-magnetic resonator cavity, preferably a reentrant cavity, an ...


2
S Perry Schlesinger, Thomas C Marshall, David B McDermott, Victor L Granatstein, Robert K Parker, Phillip A Sprangle, Philip C Efthimion: Free electron laser employing an expanded hollow intense electron beam and periodic radial magnetic field. The United States of America represented by the Secretary of the Air Force, Donald J Singer, Willard R Matthews Jr, May 25, 1982: US04331936 (16 worldwide citation)

The generation of very high power pulses of coherent electromagnetic radiation that are continuously tunable in frequency is accomplished by means of a free electron laser in which a hollow relativistic electron beam is projected along the longitudinal axis of an evacuated drift tube. A first magnet ...


3
Dennis J Helfritch, Philip C Efthimion: Removal of nitrogen oxides from waste gases. Research Cottrell, Kerkam Stowell Kondracki & Clarke, January 15, 1991: US04985219 (8 worldwide citation)

A method for the removal of nitrogen oxides from waste gases by contacting the waste gas with the products of the pyrolytic decomposition of methane containing CH and CH.sub.2 radicals to reduce the nitrogen oxides to nitrogen.


4
Andrzej Miziolek, Philip C Efthimion: Laser assisted microwave plasma spectroscopy. Fox Rothschild, Richard C Woodbridge, Ryan Miller, August 21, 2012: US08248602 (1 worldwide citation)

The present invention has a laser and a second energy source act in combination to produce a plasma that emits characteristic radiation for a prolonged period of time. The laser energy is directed to a sample for a period of time to ignite a plasma containing the sample material and to either ablate ...


5
Andrzej Miziolek, Philip C Efthimion: Laser Assisted Microwave Plasma Spectroscopy. January 12, 2012: US20120008139-A1

The present invention has a laser and a second energy source act in combination to produce a plasma that emits characteristic radiation for a prolonged period of time. The laser energy is directed to a sample for a period of time to ignite a plasma containing the sample material and to either ablate ...