Inventor · disambiguated record
Dennis J. Helfritch
Also filed as: HELFRITCH DENNIS · HELFRITCH DENNIS J
14 granted patents·2 pending applications·637 citations·filing 1976–2024
94Inventor score
Files withCOTTRELL RES INC5SOUTH DAKOTA BOARD OF REGENTS4ENVIRONMENTAL ELEMENTS CORP3AMERICAN PRECISION IND2CHAMPAGNE VICTOR K1
Top patents by PatentIndex Score
16 records- 0194US4147522AElectrostatic dust collectorAMERICAN PRECISION IND·Filed 1976·Granted Apr 3, 1979·123 cites·14 claims
- 0293US4883570AApparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic wavesCOTTRELL RES INC·Filed 1987·Granted Nov 28, 1989·111 cites·63 claims
- 0392US10441962B2Cold spray device and systemSOUTH DAKOTA BOARD OF REGENTS·Filed 2013·Granted Oct 15, 2019·7 cites·16 claims
- 0491US6245132B1Air filter with combined enhanced collection efficiency and surface sterilizationENVIRONMENTAL ELEMENTS CORP·Filed 2000·Granted Jun 12, 2001·81 cites·7 claims
- 0589US4357151AElectrostatically augmented cartridge type dust collector and methodAMERICAN PRECISION IND·Filed 1981·Granted Nov 2, 1982·61 cites·35 claims
- 0688US2024316583A1Cold Spray Device and SystemSOUTH DAKOTA BOARD OF REGENTS·Filed 2024·Application pending·0 cites
- 0783US11292019B2Cold spray device and systemSOUTH DAKOTA BOARD OF REGENTS·Filed 2019·Granted Apr 5, 2022·2 cites·16 claims
- 0882US6245126B1Method for enhancing collection efficiency and providing surface sterilization of an air filterENVIRONMENTAL ELEMENTS CORP·Filed 1999·Granted Jun 12, 2001·117 cites·6 claims
- 0976US11998942B2Cold spray device and systemSOUTH DAKOTA BOARD OF REGENTS·Filed 2022·Granted Jun 4, 2024·0 cites·7 claims
- 1075US5785932ACatalytic reactor for oxidizing mercury vaporENVIRONMENTAL ELEMENTS CORP·Filed 1996·Granted Jul 28, 1998·53 cites·27 claims
- 1165US5695616AElectron beam flue gas scrubbing treatmentVIRGINIA ACCELERATORS CORP·Filed 1995·Granted Dec 9, 1997·36 cites·13 claims
- 1258US4960445AProcess for removing SO2 and fly ash from flue gasCOTTRELL RES INC·Filed 1989·Granted Oct 2, 1990·16 cites·4 claims
- 1349US2010143700A1Cold spray impact deposition system and coating processCHAMPAGNE VICTOR K·Filed 2008·Application pending·0 cites
- 1447US4985219ARemoval of nitrogen oxides from waste gasesCOTTRELL RES INC·Filed 1990·Granted Jan 15, 1991·13 cites·9 claims
- 1542US4832806ARadiation for the selective destruction of toxic molecules on solid surfacesCOTTRELL RES INC·Filed 1987·Granted May 23, 1989·9 cites·3 claims
- 1641US5213780AMethod for nitrogen oxide reduction and flue gas reheatingCOTTRELL RES INC·Filed 1991·Granted May 25, 1993·8 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →