G01N 33/26
Oils
Official title: Oils; Viscous liquids; Paints; Inks (G01N33/22 takes precedence)
G01N33/26 (Oils) appears on 4,153 US grants and 3,892 published applications in this corpus.
Search patents in G01N- Granted patents
- 4,153
- Published applications
- 3,892
- Assignees
- 1,641
- Inventors
- 8,931
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 24 | 0 |
| 1978 | 22 | 0 |
| 1979 | 18 | 0 |
| 1980 | 16 | 0 |
| 1981 | 23 | 0 |
| 1982 | 24 | 0 |
| 1983 | 21 | 0 |
| 1984 | 32 | 0 |
| 1985 | 30 | 0 |
| 1986 | 24 | 0 |
| 1987 | 34 | 0 |
| 1988 | 41 | 0 |
| 1989 | 37 | 0 |
| 1990 | 43 | 0 |
| 1991 | 36 | 0 |
| 1992 | 53 | 0 |
| 1993 | 65 | 0 |
| 1994 | 62 | 0 |
| 1995 | 54 | 0 |
| 1996 | 64 | 0 |
| 1997 | 74 | 0 |
| 1998 | 76 | 0 |
| 1999 | 52 | 0 |
| 2000 | 49 | 0 |
| 2001 | 67 | 10 |
| 2002 | 49 | 54 |
| 2003 | 63 | 74 |
| 2004 | 70 | 99 |
| 2005 | 56 | 88 |
| 2006 | 68 | 83 |
| 2007 | 64 | 93 |
| 2008 | 74 | 116 |
| 2009 | 59 | 115 |
| 2010 | 77 | 127 |
| 2011 | 76 | 111 |
| 2012 | 97 | 131 |
| 2013 | 117 | 162 |
| 2014 | 103 | 166 |
| 2015 | 125 | 209 |
| 2016 | 145 | 256 |
| 2017 | 171 | 231 |
| 2018 | 191 | 232 |
| 2019 | 221 | 216 |
| 2020 | 226 | 215 |
| 2021 | 191 | 231 |
| 2022 | 192 | 206 |
| 2023 | 219 | 236 |
| 2024 | 170 | 165 |
| 2025 | 149 | 158 |
| 2026 | 119 | 108 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- NMR characterization of modified drilling fluids6 Oct 2026US 12,754,154 B2Schlumberger Technology Corporation
- Electrochemical sensor having an alkaline earth-modified electrolyte formulation6 Oct 2026US 12,754,157 B2Hamilton Company
- Printed coil sensors for monitoring fluid condition29 Sep 2026US 12,748,032 B2GasTOPS Ltd.
- Flow regime classification, water liquid ratio estimation, and salinity estimation systems and methods29 Sep 2026US 12,748,093 B2OneSubsea IP UK Limited
- Method of determining saturates, aromatics, resins, and asphaltene (SARA) fractions of reservoir fluid during downhole fluid analysis29 Sep 2026US 12,748,097 B2Schlumberger Technology Corporation
- Nozzle manifold assembly8 Oct 2026US 2026/0307085 A1The Aerospace Corporation
- Method for measuring downhole holdup, and method for determining downhole fluid interface and geometric distribution8 Oct 2026US 2026/0309606 A1China University of Petroleum (East China)
- Fluid cell device and method for measuring drilling mud properties8 Oct 2026US 2026/0309674 A1
- Apparatuses, processes, and systems including fuel composition determination1 Oct 2026US 2026/0298170 A1Clummins Inc.
- Ultrasonic electromagnetic sensor for multiphase cut measurements and associated methods1 Oct 2026US 2026/0298858 A1PERM Inc.
Most cited
By later US patents
- Modular data collection and analysis system379US 6,434,512 B1Reliance Electric Technologies, LLC · 2002
- Intelligent fluid sensor for machinery diagnostics, prognostics, and control294US 7,581,434 B1Rockwell Automation Technologies, Inc. · 2009
- High temperature fluid sample aging cell162US 9,784,667 B2OFI Testing Equipment, Inc. · 2017
- Sonic measurement of flow rate and water content of oil-water streams140US 4,080,837 AContinental Oil Company · 1978
- Methods and apparatus for determining gas-oil ratio in a geological formation through the use of spectroscopy131US 5,939,717 ASchlumberger Technology Corporation · 1999