C09K 8/602
Containing surfactants
Official title: {containing surfactants}
C09K8/602 (Containing surfactants) appears on 749 US grants and 940 published applications in this corpus.
Search patents in C09K- Granted patents
- 749
- Published applications
- 940
- Assignees
- 235
- Inventors
- 1,473
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 4 |
| 2004 | 3 | 10 |
| 2005 | 3 | 9 |
| 2006 | 6 | 22 |
| 2007 | 14 | 18 |
| 2008 | 13 | 27 |
| 2009 | 15 | 17 |
| 2010 | 19 | 32 |
| 2011 | 18 | 31 |
| 2012 | 20 | 32 |
| 2013 | 16 | 24 |
| 2014 | 25 | 39 |
| 2015 | 27 | 44 |
| 2016 | 29 | 60 |
| 2017 | 29 | 63 |
| 2018 | 50 | 61 |
| 2019 | 53 | 60 |
| 2020 | 49 | 75 |
| 2021 | 63 | 76 |
| 2022 | 67 | 54 |
| 2023 | 77 | 54 |
| 2024 | 50 | 60 |
| 2025 | 44 | 35 |
| 2026 | 27 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Single-phase retarded acid systems using amino acids15 Sep 2026US 12,735,627 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
- Composition and methods for inhibiting corrosion of metal during acidizing a wellbore in a subterranean formation for fracking28 Jul 2026US 12,692,428 B2
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Surfactants, surfactant compositions, and methods of using thereof24 Sep 2026US 2026/0286225 A1Chevron U.S.A.Inc.
- Corrosion inhibitor compositions and methods of use thereof27 Aug 2026US 2026/0250570 A1ChampionX LLC
- Method for modifying the permeability of a subterranean formation and related treatment fluid used in said method20 Aug 2026US 2026/0242657 A1ENI S. p. A.
- Low viscosity polymer-based retarded acid13 Aug 2026US 2026/0234466 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Surfactant compositions and uses therefor215US 6,302,209 B1BJ Services Company · 2001
- Methods for dewatering shaly subterranean formations140US 6,660,693 B2Schlumberger Technology Corporation · 2003
- Methods for controlling the fluid loss properties of viscoelastic surfactant based fluids127US 7,081,439 B2Schlumberger Technology Corporation · 2006
- Well treatment fluids and methods for the use thereof112US 6,509,301 B12003
- Composition and process for well cleaning112US 7,380,606 B2CESI Chemical, a Flotek Company · 2008