G01N 2291/0226
Oils
Official title: Oils, e.g. engine oils
G01N2291/0226 (Oils) appears on 95 US grants and 85 published applications in this corpus.
Search patents in G01N- Granted patents
- 95
- Published applications
- 85
- Assignees
- 70
- Inventors
- 218
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 5 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 5 |
| 2005 | 2 | 3 |
| 2006 | 5 | 11 |
| 2007 | 7 | 7 |
| 2008 | 4 | 1 |
| 2009 | 6 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 1 |
| 2015 | 2 | 4 |
| 2016 | 1 | 3 |
| 2017 | 3 | 3 |
| 2018 | 2 | 9 |
| 2019 | 2 | 6 |
| 2020 | 9 | 6 |
| 2021 | 5 | 5 |
| 2022 | 7 | 5 |
| 2023 | 2 | 2 |
| 2024 | 4 | 5 |
| 2025 | 0 | 1 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wet gas holdup gas fraction and flow meter11 Aug 2026US 12,704,396 B2Saudi Arabian Oil Company
- Controlling a viscosity of fuel in a fuel control system with a vibratory meter14 Apr 2026US 12,601,670 B2Micro Motion, Inc.
- Ultrasonic method and system for fluid quality measurement, classification, and monitoring10 Feb 2026US 12,546,751 B2Berkeley Springs Instruments LLC
- Methods and systems for monitoring lubricant oil condition using photoacoustic modelling20 Jan 2026US 12,529,650 B2Tata Consultancy Services Limited
- Controlling a viscosity of fuel in a fuel control system with a vibratory meter17 Dec 2024US 12,169,169 B2Micro Motion, Inc.
- Fluid cell device and method for measuring drilling mud properties8 Oct 2026US 2026/0309674 A1
- System and method for acoustic spectroscopy for fluid measurement1 Oct 2026US 2026/0298880 A1Petroleo Brasileiro S.A. - Petrobras
- Controlling a viscosity of fuel in a fuel control system with a vibratory meter30 Jan 2025US 2025/0035528 A1Micro Motion, Inc.
- Method of estimating an unstable asphaltene content in an oil sample17 Oct 2024US 2024/0344953 A1
- A method of detecting one or more markers in a petroleum fuel using a photoacoustic detector4 Jul 2024US 2024/0219366 A1BASF SE
Most cited
By later US patents
- Method and apparatus for making high-precision measurements94US 6,984,993 B2Nexense Ltd. · 2006
- Bearing-sensor integration for a lubrication analysis system78US 6,324,899 B1Reliance Electric Technologies, LLC · 2001
- Integrated multi-element lubrication sensor and health lubricant assessment system59US 6,286,363 B1Reliance Electric Technologies, LLC · 2001
- Multiple sensing system and device59US 6,839,636 B1Smiths Detection-Pasadena, Inc. · 2005
- Pipe inspection systems and methods58US 6,782,751 B2Ctes, L.C. · 2004