G01L 21/12
Measuring changes in electric resistance of measuring members
Official title: measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
G01L21/12 (Measuring changes in electric resistance of measuring members) appears on 93 US grants and 86 published applications in this corpus.
Search patents in G01L- Granted patents
- 93
- Published applications
- 86
- Assignees
- 60
- Inventors
- 176
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
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| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 3 | 2 |
| 2004 | 3 | 4 |
| 2005 | 4 | 1 |
| 2006 | 1 | 6 |
| 2007 | 4 | 4 |
| 2008 | 5 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 3 |
| 2012 | 3 | 1 |
| 2013 | 2 | 2 |
| 2014 | 1 | 5 |
| 2015 | 0 | 6 |
| 2016 | 2 | 1 |
| 2017 | 6 | 5 |
| 2018 | 1 | 3 |
| 2019 | 3 | 4 |
| 2020 | 7 | 3 |
| 2021 | 2 | 3 |
| 2022 | 4 | 5 |
| 2023 | 4 | 8 |
| 2024 | 7 | 7 |
| 2025 | 4 | 2 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrical, mechanical, computing, and/or other devices formed of extremely low resistance materials24 Mar 2026US 12,588,427 B2Ambature, Inc.
- Operating method for a group of pressure sensors17 Feb 2026US 12,553,786 B2Inficon GmbH
- Thermal conductivity vacuum gauge and thermal compensation assembly13 Jan 2026US 12,523,561 B2Edwards Limited
- Thermal conductivity vacuum gauge assembly2 Dec 2025US 12,487,141 B2Edwards Limited
- Method for operating a group of pressure sensors25 Nov 2025US 12,480,831 B2Inficon GmbH
- Electrical, Mechanical, Computing and/or Other Devices Formed of Extremely Low Resistance Materials13 Aug 2026US 2026/0239890 A1Ambature, Inc.
- Electrical, Mechanical, Computing and/or Other Devices Formed of High Temperature Superconducting Materials13 Aug 2026US 2026/0239891 A1Ambature, Inc.
- Method for manufacturing filaments for use in pirani gauges as well as pirani gauge with such a filament21 May 2026US 2026/0142062 A1Inficon GmbH
- Electrical, mechanical, computing, and/or other devices formed of extremely low resistance materials20 Mar 2025US 2025/0098551 A1Ambature, Inc.
- Thermal Conductivity Gauge13 Mar 2025US 2025/0085180 A1MKS Instruments, Inc.
Most cited
By later US patents
- Microscopic size, thermal conductivity type, air or gas absolute pressure sensor77US 4,682,503 AHoneywell Inc. · 1987
- Pressure transducer assembly77US 6,553,841 B1Helix Technology Corporation · 2003
- MEMS capacitive pressure sensor65US 9,772,245 B2ams International AG · 2017
- Miniature silicon based thermal vacuum sensor and method of measuring vacuum pressures50US 5,557,972 ATeledyne Industries, Inc. · 1996
- Apparatus and methods for heat loss pressure measurement33US 6,023,979 AHelix Technology Corporation · 2000