G01N 2009/004
Comparing frequencies of two elements
Official title: {comparing frequencies of two elements}
G01N2009/004 (Comparing frequencies of two elements) appears on 23 US grants and 21 published applications in this corpus.
Search patents in G01N- Granted patents
- 23
- Published applications
- 21
- Assignees
- 16
- Inventors
- 57
- Latest grant
- 13 Feb 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 3 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 2 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 2 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and device for measuring fluid density13 Feb 2024US 11,899,034 B2Saudi Arabian Oil Company
- Densitometer with dissimilar tube and clamp materials7 Feb 2023US 11,573,161 B2Halliburton Energy Services.Inc.
- Method for signaling a standard frequency of a density meter which has at least one vibratable measurement tube for conducting a medium3 Jan 2023US 11,543,337 B2Endress + Hauser Flowtec AG
- Densitometer with tension measuring device for increased accuracy6 Sep 2022US 11,435,273 B2Halliburton Energy Services.Inc.
- Simultaneous oscillation and frequency tracking of multiple resonances via digitally implemented phase-locked loop array12 Oct 2021US 11,143,548 B2Massachusetts Institute of Technology
- Determining and identifying anomalies in fork meters12 Feb 2026US 2026/0043729 A1Micro Motion, Inc.
- Detecting sag value of weighting material in drilling fluid in borehole27 Nov 2025US 2025/0362283 A1King Fahd University of Petroleum and Minerals
- Devices and methods employing damping of vibration in fluids2 Oct 2025US 2025/0305923 A1
- Wave interference in rheometry25 Sep 2025US 2025/0297935 A1
- Method and device for measuring fluid density20 Jul 2023US 2023/0228660 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Gas density transducer39US 4,734,609 ACalogic Corporation · 1988
- Device for measuring gas density30US 5,421,190 AAsea Brown Boveri AG · 1995
- Vibration instruments24US 4,349,881 AInternational Telephone and Telegraph Corporation · 1982
- Sensor apparatus17US 5,323,638 AGEC-Marconi Limited · 1994
- Resonant cavity gas density sensor16US 5,386,714 ASchlumberger Industries · 1995