C09K 8/58
Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the
Official title: Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
C09K8/58 (Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the) appears on 3,045 US grants and 2,726 published applications in this corpus.
Search patents in C09K- Granted patents
- 3,045
- Published applications
- 2,726
- Assignees
- 742
- Inventors
- 4,863
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 42 | 0 |
| 1978 | 60 | 0 |
| 1979 | 31 | 0 |
| 1980 | 66 | 0 |
| 1981 | 58 | 0 |
| 1982 | 39 | 0 |
| 1983 | 47 | 0 |
| 1984 | 99 | 0 |
| 1985 | 95 | 0 |
| 1986 | 55 | 0 |
| 1987 | 59 | 0 |
| 1988 | 36 | 0 |
| 1989 | 63 | 0 |
| 1990 | 53 | 0 |
| 1991 | 44 | 0 |
| 1992 | 35 | 0 |
| 1993 | 17 | 0 |
| 1994 | 26 | 0 |
| 1995 | 9 | 0 |
| 1996 | 11 | 0 |
| 1997 | 12 | 0 |
| 1998 | 7 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 4 |
| 2002 | 5 | 75 |
| 2003 | 13 | 27 |
| 2004 | 52 | 18 |
| 2005 | 20 | 12 |
| 2006 | 16 | 20 |
| 2007 | 16 | 40 |
| 2008 | 18 | 40 |
| 2009 | 22 | 74 |
| 2010 | 48 | 80 |
| 2011 | 34 | 108 |
| 2012 | 40 | 96 |
| 2013 | 68 | 116 |
| 2014 | 86 | 188 |
| 2015 | 85 | 162 |
| 2016 | 73 | 177 |
| 2017 | 126 | 159 |
| 2018 | 137 | 175 |
| 2019 | 174 | 194 |
| 2020 | 162 | 207 |
| 2021 | 178 | 169 |
| 2022 | 152 | 163 |
| 2023 | 164 | 151 |
| 2024 | 156 | 97 |
| 2025 | 114 | 114 |
| 2026 | 58 | 60 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for coal seam gas seepage displacement, seepage water locking and dust reduction22 Sep 2026US 12,742,389 B2Hunan University of Science and Technology
- Apparatus and method for CO2 microbubble flooding15 Sep 2026US 12,734,490 B2Dalian University of Technology
- Surface-modified nanoparticle compositions and related applications in subterranean hydrocarbon recovery15 Sep 2026US 12,735,626 B2
- Enhanced solvent recovery from tight rock and shale oil wells15 Sep 2026US 12,735,965 B2Oil Technology Group LLC
- Methods and systems for producing organic compounds in a subterranean environment25 Aug 2026US 12,716,334 B2Cemvita Factory, Inc.
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Surface active organic alkali agents1 Oct 2026US 2026/0297420 A1Ultimate Eor Services LLC
- Carbonate reaction products of alkyl glycosides and methods for use thereof24 Sep 2026US 2026/0286212 A1Saudi Arabian Oil Company
- System and method for optimized production of hydrocarbons from shale oil reservoirs via cyclic injection24 Sep 2026US 2026/0286213 A1Shale Ingenuity, LLC
- Conventional chemical eor application without salinity gradient24 Sep 2026US 2026/0286817 A1Chevron U.S.A.Inc.
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- In situ recovery from a kerogen and liquid hydrocarbon containing formation332US 7,011,154 B2Shell Oil Company · 2006
- In situ thermal processing of a hydrocarbon containing formation using a selected production well spacing311US 6,712,136 B2Shell Oil Company · 2004
- In Situ thermal processing of a hydrocarbon containing formation to produce sulfur containing formation fluids298US 6,581,684 B2Shell Oil Company · 2003
- Method for improving injectivity of fluids in oil reservoirs290US 5,632,336 ATexaco Inc. · 1997