C09K 2208/30
Viscoelastic surfactants [ves]
Official title: Viscoelastic surfactants [VES]
C09K2208/30 (Viscoelastic surfactants [ves]) appears on 404 US grants and 497 published applications in this corpus.
Search patents in C09K- Granted patents
- 404
- Published applications
- 497
- Assignees
- 77
- Inventors
- 670
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 9 |
| 2003 | 5 | 11 |
| 2004 | 5 | 14 |
| 2005 | 4 | 21 |
| 2006 | 14 | 33 |
| 2007 | 26 | 26 |
| 2008 | 21 | 54 |
| 2009 | 17 | 29 |
| 2010 | 38 | 27 |
| 2011 | 28 | 27 |
| 2012 | 24 | 31 |
| 2013 | 18 | 29 |
| 2014 | 23 | 16 |
| 2015 | 19 | 14 |
| 2016 | 16 | 16 |
| 2017 | 15 | 20 |
| 2018 | 11 | 18 |
| 2019 | 13 | 24 |
| 2020 | 19 | 11 |
| 2021 | 13 | 13 |
| 2022 | 17 | 9 |
| 2023 | 11 | 12 |
| 2024 | 13 | 16 |
| 2025 | 7 | 11 |
| 2026 | 13 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Single-phase retarded acid systems using amino acids15 Sep 2026US 12,735,627 B2Schlumberger Technology Corporation
- Method for single-stage treatment of siliceous subterranean formations25 Aug 2026US 12,716,022 B2Schlumberger Technology Corporation
- Viscoelastic surfactant formulations and use in subterranean formations11 Aug 2026US 12,703,821 B2Energy Solutions (US) LLC
- Well clean premium (WCP-1) system and method11 Aug 2026US 12,703,823 B2Hygt Chemical LLC
- Combination of polyglycerol-10 laurate and an alcohol to reverse the rock wettability of a reservoir4 Aug 2026US 12,698,434 B1Oleon NV
- Method for single-stage treatment of siliceous subterranean formations13 Aug 2026US 2026/0234465 A1Schlumberger Technology Corporation
- Treatment fluid selection12 Mar 2026US 2026/0071533 A1Halliburton Energy Services.Inc.
- Viscoelastic foam system for acidic gas switch, and method and use for improving the recovery factor using the same12 Feb 2026US 2026/0042955 A1China Petroleum & Chemical Corporation
- Method for single-stage treatment of siliceous subterranean formations12 Feb 2026US 2026/0042956 A1Schlumberger Technology Corporation
- Single-phase retarded acid systems using amino acids8 Jan 2026US 2026/0008954 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Methods for limiting the inflow of formation water and for stimulating subterranean formations350US 5,979,557 ASchlumberger Technology Corporation · 1999
- Methods and compositions for testing subterranean formations303US 5,964,295 ASchlumberger Technology Corporation - Dowell Division · 1999
- Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations224US 6,435,277 B1Schlumberger Technology Corporation · 2002
- Methods of fracturing subterranean formations223US 6,306,800 B1Schlumberger Technology Corporation · 2001
- Viscoelastic surfactant fluids and related methods of use217US 6,258,859 B1Rhodia Inc. · 2001