C09K 8/502
Oil-based compositions
C09K8/502 (Oil-based compositions) appears on 290 US grants and 268 published applications in this corpus.
Search patents in C09K- Granted patents
- 290
- Published applications
- 268
- Assignees
- 98
- Inventors
- 576
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 5 | 8 |
| 2004 | 5 | 3 |
| 2005 | 0 | 6 |
| 2006 | 1 | 7 |
| 2007 | 7 | 5 |
| 2008 | 3 | 7 |
| 2009 | 5 | 7 |
| 2010 | 4 | 10 |
| 2011 | 8 | 14 |
| 2012 | 7 | 12 |
| 2013 | 7 | 9 |
| 2014 | 10 | 14 |
| 2015 | 7 | 17 |
| 2016 | 6 | 21 |
| 2017 | 14 | 29 |
| 2018 | 24 | 14 |
| 2019 | 14 | 11 |
| 2020 | 17 | 19 |
| 2021 | 21 | 20 |
| 2022 | 22 | 13 |
| 2023 | 13 | 6 |
| 2024 | 11 | 6 |
| 2025 | 3 | 7 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for improving oil and gas well productivity and encapsulated lubricating frac fluid additive by lubrication of stimulated reservoir volume25 Aug 2026US 12,716,321 B2Saudi Arabian Oil Company
- Packer fluids including ethylene glycol16 Jun 2026US 12,655,339 B2Saudi Arabian Oil Company
- Methods and compositions using dissolvable gelled materials for diversion31 Mar 2026US 12,590,240 B2Schlumberger Technology Corporation
- Methods for increasing the mechanical strength of subterranean formations using MXene-containing fluids24 Feb 2026US 12,560,068 B2Saudi Arabian Oil Company
- Methods of using multi-particle lost circulation material in highly porous or fractured formations9 Sep 2025US 12,410,666 B2Weatherford Technology Holdings, LLC
- Process for preparing an oil-well cement slurry24 Sep 2026US 2026/0286209 A1Oil and Natural Gas Corporation Limited
- Methods for increasing the mechanical strength of subterranean formations using mxene-containing fluids20 Nov 2025US 2025/0354470 A1Saudi Arabian Oil Company
- Packer fluids including ethylene glycol30 Oct 2025US 2025/0333634 A1Saudi Arabian Oil Company
- Methods of treatment of subterranean formation with polymeric structures formed in situ19 Jun 2025US 2025/0198268 A1Schlumberger Technology Corporation
- Self-degrading organogels12 Jun 2025US 2025/0188337 A1BP Exploration Operating Company Limited
Most cited
By later US patents
- Settable spotting fluid compositions and methods151US 6,138,759 AHalliburton Energy Services.Inc. · 2000
- Permeable cement composition and method136US 3,948,672 ATexaco Inc. · 1976
- Profile control in enhanced oil recovery131US 5,103,909 AShell Oil Company · 1992
- Method and composition for stabilizing incompetent oil-containing formations126US 3,955,993 ATexaco Inc. · 1976
- Well completion and remedial methods utilizing cement-ladened rubber125US 5,293,938 AHalliburton Company · 1994