C09K 8/82
Oil-based compositions
Official title: Oil-based compositions (C09K8/64 takes precedence)
C09K8/82 (Oil-based compositions) appears on 252 US grants and 281 published applications in this corpus.
Search patents in C09K- Granted patents
- 252
- Published applications
- 281
- Assignees
- 108
- Inventors
- 521
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 5 |
| 2004 | 3 | 2 |
| 2005 | 2 | 10 |
| 2006 | 1 | 5 |
| 2007 | 8 | 4 |
| 2008 | 6 | 3 |
| 2009 | 7 | 4 |
| 2010 | 1 | 2 |
| 2011 | 4 | 5 |
| 2012 | 4 | 7 |
| 2013 | 3 | 7 |
| 2014 | 8 | 26 |
| 2015 | 6 | 16 |
| 2016 | 8 | 33 |
| 2017 | 31 | 37 |
| 2018 | 16 | 20 |
| 2019 | 17 | 20 |
| 2020 | 24 | 22 |
| 2021 | 23 | 19 |
| 2022 | 15 | 12 |
| 2023 | 15 | 4 |
| 2024 | 7 | 9 |
| 2025 | 5 | 3 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Surface treatment compositions used for carbon sequestration, hydraulic fracturing and increasing oil production from a subterranean formation, and method of hydraulic fracturing29 Sep 2026US 12,747,386 B2Aculon, Inc.
- Radiation activated well treatment7 Apr 2026US 12,595,407 B2Saudi Arabian Oil Company
- Well treatment compositions and methods of making and using same31 Mar 2026US 12,590,242 B1
- Viscosifying friction reducers14 Oct 2025US 12,441,934 B2Energy Solutions (US) LLC
- Methods for making and using retarded acid compositions for well stimulation27 May 2025US 12,312,537 B2Schlumberger Technology Corporation
- Corrosion inhibitor compositions and methods of use thereof27 Aug 2026US 2026/0250570 A1ChampionX LLC
- Liquid weighting agents for oil-based fluids9 Jul 2026US 2026/0193531 A1Albemarle Corporation
- Injection Fluids Comprising Propoxylated Alcohols and the Use of Such Fluids for Acid Stimulation During Oil Recovery Processes18 Jun 2026US 2026/0167858 A1
- Highly concentrated particulate polymer friction-reducing slurry compositions and fracturing fluids made therefrom and methods for making and using same19 Feb 2026US 2026/0049241 A1PfP Industries, LLC
- Methods of treatment of subterranean formation with polymeric structures formed in situ19 Jun 2025US 2025/0198268 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Hydrocarbon-based fracturing fluid composition, system, and method174US 9,850,422 B2ProStim Labs, LLC · 2017
- Gas well treatment compositions and methods135US 5,310,002 AHalliburton Company · 1994
- Profile control in enhanced oil recovery131US 5,103,909 AShell Oil Company · 1992
- Composition and process for well cleaning112US 7,380,606 B2CESI Chemical, a Flotek Company · 2008
- Liquid fluid loss control additive for oil field cements94US 4,687,516 AHalliburton Company · 1987