C09K 8/665
Containing inorganic compounds
Official title: {containing inorganic compounds (proppants C09K8/80)}
C09K8/665 (Containing inorganic compounds) appears on 438 US grants and 535 published applications in this corpus.
Search patents in C09K- Granted patents
- 438
- Published applications
- 535
- Assignees
- 143
- Inventors
- 902
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 3 |
| 2003 | 1 | 2 |
| 2004 | 2 | 6 |
| 2005 | 3 | 7 |
| 2006 | 8 | 9 |
| 2007 | 1 | 5 |
| 2008 | 2 | 8 |
| 2009 | 6 | 12 |
| 2010 | 9 | 14 |
| 2011 | 7 | 16 |
| 2012 | 11 | 23 |
| 2013 | 11 | 11 |
| 2014 | 9 | 16 |
| 2015 | 15 | 20 |
| 2016 | 11 | 28 |
| 2017 | 20 | 36 |
| 2018 | 26 | 48 |
| 2019 | 37 | 65 |
| 2020 | 45 | 54 |
| 2021 | 54 | 50 |
| 2022 | 45 | 26 |
| 2023 | 33 | 27 |
| 2024 | 25 | 23 |
| 2025 | 16 | 17 |
| 2026 | 10 | 8 |
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
- Cavitation, dissolver, and sand integration for wellbore descaling25 Aug 2026US 12,716,328 B1Saudi 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
- Composition and method for improving the production of petroleum hydrocarbons14 Jul 2026US 12,680,013 B2Beijing Huamei, Inc.
- Electro-hydrofracturing using electrically conductive proppants and related methods14 Jul 2026US 12,680,014 B2Eden GeoPower, Inc.
- Particulate compositions for iron sulfide remediation1 Oct 2026US 2026/0297419 A1ChampionX LLC
- Method for injecting an aqueous polymer solution into an underground formation10 Sep 2026US 2026/0265603 A1Snf Group
- Systems and methods for recovering ammonia from a subsurface formation13 Aug 2026US 2026/0235015 A1King Fahd University of Petroleum and Minerals
- Inorganic hydrocarbon scavenger fluid9 Jul 2026US 2026/0193529 A1Halliburton Energy Services.Inc.
- Method of hydraulic fracturing utilizing a hydraulic fracturing fluid with a single phase liquid proppant16 Apr 2026US 2026/0103634 A1Beijing Huamei, Inc.
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
- Control of particulate flowback in subterranean wells227US 6,172,011 B2Schlumberger Technolgy Corporation · 2001
- Encapsulated breakers and method for use in treating subterranean formations161US 6,357,527 B1Halliburton Energy Services.Inc. · 2002