C09K 8/70
Characterised by their form or by the form of their components
Official title: characterised by their form or by the form of their components, e.g. foams
C09K8/70 (Characterised by their form or by the form of their components) appears on 844 US grants and 1,041 published applications in this corpus.
Search patents in C09K- Granted patents
- 844
- Published applications
- 1,041
- Assignees
- 270
- Inventors
- 1,575
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 7 | 1 |
| 2002 | 5 | 8 |
| 2003 | 3 | 17 |
| 2004 | 11 | 14 |
| 2005 | 12 | 29 |
| 2006 | 24 | 32 |
| 2007 | 17 | 26 |
| 2008 | 14 | 32 |
| 2009 | 14 | 26 |
| 2010 | 23 | 41 |
| 2011 | 22 | 41 |
| 2012 | 29 | 50 |
| 2013 | 32 | 46 |
| 2014 | 30 | 48 |
| 2015 | 31 | 55 |
| 2016 | 26 | 77 |
| 2017 | 42 | 69 |
| 2018 | 64 | 84 |
| 2019 | 62 | 66 |
| 2020 | 60 | 65 |
| 2021 | 59 | 57 |
| 2022 | 63 | 39 |
| 2023 | 46 | 38 |
| 2024 | 37 | 38 |
| 2025 | 28 | 27 |
| 2026 | 21 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for hydraulic fracturing of conventional and unconventional reservoirs by introducing energized fluid8 Sep 2026US 12,729,617 B2Schlumberger Technology Corporation
- Foamed fracturing fluid with scale protection1 Sep 2026US 12,723,189 B1Halliburton Energy Services.Inc.
- Electrical stimulation of hydrogen-producing rocks and reservoirs1 Sep 2026US 12,723,499 B2Eden GeoPower, Inc.
- 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
- Systems and methods for generation of hydrogen by in-situ (subsurface) serpentinization and carbonization of mafic or ultramafic rock25 Aug 2026US 12,716,336 B2Ohio State Innovation Foundation
- Calcium carbonate coated tracers for assessing acid stimulation operations in a hydrocarbon well24 Sep 2026US 2026/0286838 A1Chevron U.S.A.Inc.
- Degradable fibers for water savings in hydraulic fracturing17 Sep 2026US 2026/0275844 A1Schlumberger Technology Corporation
- Method for single-stage treatment of siliceous subterranean formations13 Aug 2026US 2026/0234465 A1Schlumberger Technology Corporation
- Systems and methods for recovering ammonia from a subsurface formation13 Aug 2026US 2026/0235015 A1King Fahd University of Petroleum and Minerals
- Iron control as part of a well treatment using time-released agents30 Jul 2026US 2026/0218036 A1Flex-Chem Holding Company, LLC
Most cited
By later US patents
- Control of particulate flowback in subterranean wells379US 5,330,005 ADowell Schlumberger Incorporated · 1994
- Control of particulate flowback in subterranean wells372US 5,501,275 ADowell, a division of Schlumberger Technology Corporation · 1996
- Control of particulate flowback in subterranean wells358US 5,439,055 ADowell, a division of Schlumberger Technology Corporation · 1995
- Formation treatment method using deformable particles341US 6,330,916 B1BJ Services Company · 2001
- Encapsulated breakers and method for use in treating subterranean formations285US 5,373,901 AHalliburton Company · 1994