C09K 8/145
Characterised by the composition of the clay
Official title: {characterised by the composition of the clay}
C09K8/145 (Characterised by the composition of the clay) appears on 138 US grants and 78 published applications in this corpus.
Search patents in C09K- Granted patents
- 138
- Published applications
- 78
- Assignees
- 60
- Inventors
- 279
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 3 |
| 2012 | 0 | 4 |
| 2013 | 3 | 2 |
| 2014 | 1 | 2 |
| 2015 | 5 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 4 |
| 2019 | 7 | 13 |
| 2020 | 9 | 6 |
| 2021 | 10 | 12 |
| 2022 | 9 | 5 |
| 2023 | 3 | 3 |
| 2024 | 7 | 3 |
| 2025 | 5 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Combination clay stabilizer having an alkali metal asphalt sulfonate and quaternary ammonium salt7 Oct 2025US 12,435,256 B1Chevron Phillips Chemical Company LP
- Plant-based drilling fluid composition12 Aug 2025US 12,384,951 B1King Fahd University of Petroleum and Minerals
- Okra composition as a shale swelling inhibitor in water-based drilling fluids27 May 2025US 12,312,531 B2King Fahd University of Petroleum and Minerals
- High temperature high salt low end rheology modifiers4 Mar 2025US 12,241,016 B2Beijing Huamei, Inc.
- Water-based foamed system for perforating zones with low pressure and high temperature7 Jan 2025US 12,187,957 B2Pro Fluidos, S.A. De C.V.
- Nano clay mineral-based drilling mud and method for producing same20 Aug 2026US 2026/0242656 A1Industry-Academic Cooperation Foundation Gyeongsang National University
- Drilling with water-based mud including multiple clays23 Oct 2025US 2025/0326963 A1Saudi Arabian Oil Company
- Plant-based drilling fluid composition7 Aug 2025US 2025/0250475 A1King Fahd University of Petroleum and Minerals
- High temperature high salt low end rheology modifiers19 Jun 2025US 2025/0197709 A1Beijing Huamei, Inc.
- Okra composition as a shale swelling inhibitor in water-based drilling fluids16 May 2024US 2024/0158684 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Drilling and cementing with blast furnace slag/silicate fluid152US 5,361,842 AShell Oil Company · 1994
- Settable fluids and methods for use in subterranean formations118US 6,908,508 B2Halliburton Energy Services.Inc. · 2005
- Organoclay compositions and method of preparation94US 6,036,765 ASouthern Clay Products, Inc. · 2000
- Well drilling and completion fluid composition89US 4,536,297 AHalliburton Company · 1985
- Mixed metal layered hydroxide-clay adducts as thickeners for water and other hydrophylic fluids87US 4,664,843 AThe Dow Chemical Company · 1987