C09K 8/516
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. encapsulated material
C09K8/516 (Characterised by their form or by the form of their components) appears on 792 US grants and 917 published applications in this corpus.
Search patents in C09K- Granted patents
- 792
- Published applications
- 917
- Assignees
- 239
- Inventors
- 1,447
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 7 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 12 |
| 2004 | 5 | 9 |
| 2005 | 3 | 17 |
| 2006 | 11 | 16 |
| 2007 | 10 | 17 |
| 2008 | 9 | 26 |
| 2009 | 8 | 32 |
| 2010 | 24 | 28 |
| 2011 | 30 | 34 |
| 2012 | 12 | 36 |
| 2013 | 20 | 29 |
| 2014 | 24 | 40 |
| 2015 | 28 | 47 |
| 2016 | 19 | 51 |
| 2017 | 37 | 65 |
| 2018 | 54 | 57 |
| 2019 | 68 | 90 |
| 2020 | 66 | 61 |
| 2021 | 81 | 78 |
| 2022 | 67 | 46 |
| 2023 | 49 | 38 |
| 2024 | 51 | 35 |
| 2025 | 31 | 29 |
| 2026 | 11 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Method for subsurface injection conformance improvement using micro calcium carbonate particles11 Aug 2026US 12,703,820 B2Millcreek Capital Management LLC
- Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures21 Jul 2026US 12,686,804 B2The Penn State Research Foundation
- Lost circulation material compositions utilizing spent drilling fluids and methods for using the same16 Jun 2026US 12,655,697 B2Saudi Arabian Oil Company
- Resin composition for encapsulating light-emitting device, light source unit, and method for manufacturing light source unit9 Jun 2026US 12,653,060 B2Nitto Denko Corporation
- Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures8 Oct 2026US 2026/0308440 A1The Penn State Research Foundation
- Providing selective dissolvable coatings on a multi-shell core system for inflow control devices1 Oct 2026US 2026/0297418 A1Saudi Arabian Oil Company
- Plug barrier material27 Aug 2026US 2026/0251034 A1Isol8 (Holdings) Limited
- Method for modifying the permeability of a geological formation zone20 Aug 2026US 2026/0243145 A1
- Method for designing construction parameters of nitrogen foam-carried gravel packing in high-loss horizontal wells20 Aug 2026US 2026/0244803 A1China University of Petroleum (East China)
Most cited
By later US patents
- Encapsulated chemicals for use in controlled time release applications and methods314US 6,527,051 B1Halliburton Energy Services.Inc. · 2003
- Controlling the release of chemical additives in well treating fluids282US 6,209,646 B1Halliburton Energy Services.Inc. · 2001
- Encapsulated chemicals for use in controlled time release applications and methods279US 6,554,071 B1Halliburton Energy Services.Inc. · 2003
- Downhole chemical delivery system for oil and gas wells243US 6,279,656 B1Santrol, Inc. · 2001
- Method for reducing the permeability of subterranean formations229US 4,387,769 AExxon Production Research Company · 1983