G01N 21/67
Using electric arcs or discharges
Official title: using electric arcs or discharges
G01N21/67 (Using electric arcs or discharges) appears on 235 US grants and 217 published applications in this corpus.
Search patents in G01N- Granted patents
- 235
- Published applications
- 217
- Assignees
- 194
- Inventors
- 559
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 6 | 4 |
| 2003 | 2 | 2 |
| 2004 | 7 | 11 |
| 2005 | 3 | 7 |
| 2006 | 4 | 3 |
| 2007 | 3 | 9 |
| 2008 | 6 | 7 |
| 2009 | 2 | 10 |
| 2010 | 7 | 5 |
| 2011 | 7 | 5 |
| 2012 | 4 | 6 |
| 2013 | 5 | 10 |
| 2014 | 5 | 9 |
| 2015 | 17 | 13 |
| 2016 | 4 | 5 |
| 2017 | 9 | 11 |
| 2018 | 13 | 14 |
| 2019 | 9 | 7 |
| 2020 | 11 | 16 |
| 2021 | 11 | 14 |
| 2022 | 5 | 15 |
| 2023 | 6 | 9 |
| 2024 | 15 | 12 |
| 2025 | 9 | 10 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Circuit adaptive zero-voltage switching control method based on switch transistor electroluminescence, electroluminescence detection circuit, and assembly structure thereof11 Aug 2026US 12,704,463 B2Nanjing Efficient Power for Intelligent Computing Technologies Co. Ltd.
- Plasma control for spark optical emission spectroscopy5 May 2026US 12,621,920 B2FEI Company
- Field-biased nonlinear optical metrology using corona discharge source14 Apr 2026US 12,601,778 B2FemtoMetrix, Inc.
- Method and apparatus for non-invasive, non-intrusive, and un-grounded, simultaneous corona deposition and SHG measurements24 Feb 2026US 12,562,333 B2FemtoMetrix, Inc.
- Magnetic confinement of arc discharge migration in spark OES systems21 Oct 2025US 12,449,367 B2Thermo Electron Scientific Instruments LLC
- Emission spectroscopic analysis method for sb in metal material, method for measuring sb concentration in molten steel during refining, and method for manufacturing steel material20 Aug 2026US 2026/0243688 A1Jfe Steel Corporation
- Methods for quantitatively analyzing chromate coatings on metal substrates23 Apr 2026US 2026/0110638 A1
- Systems and methods for spectroscopic instrument calibration5 Feb 2026US 2026/0036512 A1Thermo Electron Scientific Instruments LLC
- Device, system and method for detecting substances in liquid to be tested using plasma spectroscopy4 Dec 2025US 2025/0369892 A1National Taiwan University
- Image compounding for mixed transducer arrays20 Nov 2025US 2025/0352185 A1DeepSight Technology, Inc.
Most cited
By later US patents
- On-site analyzer71US 6,452,179 B1Global Technovations, Inc. · 2002
- End-point detection55US 5,288,367 AInternational Business Machines Corporation · 1994
- Ambient-atmosphere glow discharge for determination of elemental concentration in solutions in a high-throughput or transient fashion44US 7,929,138 B1The United States of America as represented by the United States Department of Energy · 2011
- End-point detection in plasma etching or phosphosilicate glass40US 4,415,402 AThe Perkin-Elmer Corporation · 1983
- Sampling and analysis of airborne particulate matter by glow discharge atomic emission and mass spectrometries38US 6,750,449 B2Clemson University · 2004