C09K 8/706
Encapsulated breakers
Official title: {Encapsulated breakers}
C09K8/706 (Encapsulated breakers) appears on 141 US grants and 172 published applications in this corpus.
Search patents in C09K- Granted patents
- 141
- Published applications
- 172
- Assignees
- 70
- Inventors
- 365
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 4 |
| 2003 | 1 | 6 |
| 2004 | 4 | 4 |
| 2005 | 5 | 12 |
| 2006 | 8 | 9 |
| 2007 | 5 | 5 |
| 2008 | 4 | 5 |
| 2009 | 3 | 4 |
| 2010 | 4 | 9 |
| 2011 | 4 | 5 |
| 2012 | 8 | 6 |
| 2013 | 10 | 5 |
| 2014 | 1 | 6 |
| 2015 | 5 | 5 |
| 2016 | 2 | 15 |
| 2017 | 2 | 11 |
| 2018 | 13 | 16 |
| 2019 | 8 | 13 |
| 2020 | 13 | 7 |
| 2021 | 10 | 9 |
| 2022 | 7 | 8 |
| 2023 | 5 | 4 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Radiation activated well treatment7 Apr 2026US 12,595,407 B2Saudi Arabian Oil Company
- Treating flowback emulsions3 Feb 2026US 12,540,272 B2Halliburton Energy Services.Inc.
- Multicomponent nanocapsules for enhanced oil recovery22 Jul 2025US 12,365,827 B2Saudi Arabian Oil Company
- Methods for delaying in situ acid generation for acid delivery to a site18 Feb 2025US 12,227,697 B2Saudi Arabian Oil Company
- Method and composition to enhance the performance of encapsulated breakers14 May 2024US 11,981,863 B2Saudi Arabian Oil Company
- Treating Flowback Emulsions15 Jan 2026US 2026/0015541 A1Halliburton Energy Services.Inc.
- Radiation activated well treatment13 Mar 2025US 2025/0084300 A1Aramco Innovations LLC
- Internal breakers encapsulated by calcium carbonate formed from sequestered carbon dioxide23 May 2024US 2024/0166940 A1Chevron U.S.A.Inc.
- Method and composition to enhance the performance of encapsulated breakers23 Nov 2023US 2023/0374373 A1Saudi Arabian Oil Company
- Encapsulated proppant particles for hydraulic fracturing12 Oct 2023US 2023/0323195 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Encapsulated breakers and method for use in treating subterranean formations285US 5,373,901 AHalliburton Company · 1994
- Method for treating subterranean formations246US 4,741,401 AThe Dow Chemical Company · 1988
- Fluids and techniques for maximizing fracture fluid clean-up200US 6,192,985 B1Schlumberger Technology Corporation · 2001
- Fracturing fluid with encapsulated breaker172US 5,591,700 AHalliburton Company · 1997
- Encapsulated enzyme breaker and method for use in treating subterranean formations170US 5,604,186 AHalliburton Company · 1997