G01L 21/32
Using electric discharge tubes with thermionic cathodes
Official title: using electric discharge tubes with thermionic cathodes
G01L21/32 (Using electric discharge tubes with thermionic cathodes) appears on 56 US grants and 34 published applications in this corpus.
Search patents in G01L- Granted patents
- 56
- Published applications
- 34
- Assignees
- 32
- Inventors
- 85
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 2 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 3 |
| 2017 | 2 | 6 |
| 2018 | 6 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Operating method for a group of pressure sensors17 Feb 2026US 12,553,786 B2Inficon GmbH
- Diaphragm pressure gauge and compound pressure gauge14 Oct 2025US 12,442,706 B2Q'z Corporation
- Vacuum feedthrough, electrode assembly, and device for generating a silent plasma discharge17 Sep 2024US 12,096,545 B2Inficon GmbH
- Method for detecting pressure, and pressure sensor10 Sep 2024US 12,085,467 B2Inficon GmbH
- Method and apparatus for characterizing homodyne transmitters and receivers8 Mar 2022US 11,268,997 B1Keysight Technologies, Inc.
- Diaphragm pressure gauge and compound pressure gauge15 Jan 2026US 2026/0016357 A1Q'z Corporation
- Vacuum feedthrough, electrode assembly, and device for generating a silent plasma discharge13 Jun 2024US 2024/0196508 A1Inficon GmbH
- Operating method for a group of pressure sensors16 Nov 2023US 2023/0366766 A1Inficon GmbH
- Diaphragm pressure gauge and compound pressure gauge28 Sep 2023US 2023/0304883 A1Vacuum Products Corporation
- Method for detecting pressure, and pressure sensor20 Oct 2022US 2022/0334016 A1Inficon GmbH
Most cited
By later US patents
- Wide-range combination vacuum gauge29US 7,207,224 B2Brooks Automation, Inc. · 2007
- Ionization gauge and method of using and calibrating same28US 5,422,573 AGranville-Phillips Company · 1995
- Gas pressure gage24US 4,747,311 ASeiko Instruments Inc. · 1988
- Ionization gauge and method of using and calibrating same24US 5,250,906 AGranville-Phillips Company · 1993
- Apparatus and method for measuring pressures and indicating leaks with optical analysis22US 4,270,091 AVarian Associates, Inc. · 1981