C09K 8/607
Specially adapted for clay formations
Official title: {specially adapted for clay formations}
C09K8/607 (Specially adapted for clay formations) appears on 167 US grants and 98 published applications in this corpus.
Search patents in C09K- Granted patents
- 167
- Published applications
- 98
- Assignees
- 84
- Inventors
- 350
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 10 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 4 |
| 2005 | 2 | 4 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 3 | 1 |
| 2010 | 2 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 3 |
| 2013 | 0 | 3 |
| 2014 | 4 | 8 |
| 2015 | 1 | 3 |
| 2016 | 5 | 6 |
| 2017 | 5 | 8 |
| 2018 | 7 | 14 |
| 2019 | 6 | 5 |
| 2020 | 5 | 7 |
| 2021 | 9 | 10 |
| 2022 | 5 | 5 |
| 2023 | 10 | 1 |
| 2024 | 1 | 4 |
| 2025 | 2 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Functionalized nanoparticles as wetability modifier30 Sep 2025US 12,428,592 B2Schlumberger Technology Corporation
- Ionic liquid chain transfer agent as well treatment additive26 Aug 2025US 12,398,313 B2Halliburton Energy Services.Inc.
- Polymer composition for use in a camera module9 Jul 2024US 12,032,272 B2Ticona LLC
- Decreasing proppant embedment with amine-functionalized polysaccharides28 Nov 2023US 11,827,846 B2Integrity Bio-Chemicals, LLC
- Stable high solids slurry compositions10 Oct 2023US 11,781,056 B2KAO Specialties Americas
- Hybrid polymer and process for producing same30 Jul 2026US 2026/0217890 A1Snf Group
- Functionalized nanoparticles as wetability modifier22 Jan 2026US 2026/0022291 A1Schlumberger Technology Corporation
- Functionalized nanoparticles as wetability modifier30 Jan 2025US 2025/0034450 A1Schlumberger Technology Corporation
- Ionic Liquid Chain Transfer Agent As Well Treatment Additive11 Jul 2024US 2024/0228861 A1Halliburton Energy Services.Inc.
- Method for characterising the presence of polymers and/or quantifying polymers in a porous medium11 Jul 2024US 2024/0230615 A1
Most cited
By later US patents
- Oil recovery by enhanced imbitition in low permeability reservoirs213US 5,411,086 AMobil Oil Corporation · 1995
- Clay stabilizer144US 5,342,530 ANalco Chemical Company · 1994
- Oil well treating method and composition92US 4,366,071 AHalliburton Company · 1982
- Oil well treating method and composition87US 4,366,074 AHalliburton Company · 1982
- Method for clay stabilization with quaternary amines79US 5,197,544 AHalliburton Company · 1993