G01N 2021/855
Underground probe
Official title: {Underground probe, e.g. with provision of a penetration tool}
G01N2021/855 (Underground probe) appears on 43 US grants and 45 published applications in this corpus.
Search patents in G01N- Granted patents
- 43
- Published applications
- 45
- Assignees
- 31
- Inventors
- 95
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 2 |
| 2020 | 4 | 5 |
| 2021 | 0 | 3 |
| 2022 | 3 | 4 |
| 2023 | 6 | 5 |
| 2024 | 3 | 5 |
| 2025 | 7 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure tuned infrared light emitting diode for downhole spectroscopy19 May 2026US 12,631,111 B2Baker Hughes Oilfield Operations LLC
- Automated device for drill cuttings image acquisition14 Apr 2026US 12,604,092 B2Schlumberger Technology Corporation
- Bi-conical optical sensor for obtaining downhole fluid properties3 Jun 2025US 12,320,255 B2Baker Hughes Oilfield Operations LLC
- Systems and methods for differentiating bubble points from dew points13 May 2025US 12,298,242 B2Schlumberger Technology Corporation
- Method and apparatus for detecting chemical compounds in soil4 Mar 2025US 12,241,829 B2S4 Mobile Laboratories, LLC
- Detection and monitoring of scale formation in fluid mixtures30 Jul 2026US 2026/0219183 A1King Fahd University of Petroleum and Minerals
- System for testing soil properties25 Jun 2026US 2026/0173995 A1Nirby Spolka Z Ograniczona Odpowiedzialnoscia
- Pressure tuned infrared light emitting diode for downhole spectroscopy3 Jul 2025US 2025/0215795 A1Baker Hughes Oilfield Operations LLC
- Attenuated total internal reflection optical sensor for obtaining downhole fluid properties3 Jul 2025US 2025/0215797 A1Baker Hughes Oilfield Operations LLC
- Optical probe and method for in situ soil analysis8 May 2025US 2025/0147200 A1Chrysalabs Inc.
Most cited
By later US patents
- Real-time soil organic matter sensor51US 5,044,756 APurdue Research Foundation · 1991
- Apparatus and tool using tracers and singles point optical probes for measuring characteristics of fluid flow in a hydrocarbon well and methods of processing resulting signals48US 6,016,191 ASchlumberger Technology Corporation · 2000
- Method and apparatus for a derivative spectrometer33US 6,798,518 B2Baker Hughes Incorporated · 2004
- Method for quantitative calibration of in situ optical chemical measurements in soils using soil class and characteristics30US 5,316,950 AThe United States of America as represented by the Secretary of the Navy · 1994
- Method and apparatus for a downhole fluorescence spectrometer20US 7,084,392 B2Baker Hughes Incorporated · 2006