C09K 8/588
Characterised by the use of specific polymers
Official title: characterised by the use of specific polymers {(polymeric surfactants C09K8/584)}
C09K8/588 (Characterised by the use of specific polymers) appears on 916 US grants and 805 published applications in this corpus.
Search patents in C09K- Granted patents
- 916
- Published applications
- 805
- Assignees
- 293
- Inventors
- 1,698
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 12 | 0 |
| 1979 | 6 | 0 |
| 1980 | 19 | 0 |
| 1981 | 18 | 0 |
| 1982 | 17 | 0 |
| 1983 | 14 | 0 |
| 1984 | 26 | 0 |
| 1985 | 30 | 0 |
| 1986 | 22 | 0 |
| 1987 | 26 | 0 |
| 1988 | 11 | 0 |
| 1989 | 17 | 0 |
| 1990 | 16 | 0 |
| 1991 | 9 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 3 |
| 2004 | 1 | 2 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 3 | 8 |
| 2008 | 1 | 4 |
| 2009 | 3 | 18 |
| 2010 | 12 | 28 |
| 2011 | 12 | 19 |
| 2012 | 9 | 24 |
| 2013 | 12 | 30 |
| 2014 | 24 | 60 |
| 2015 | 29 | 47 |
| 2016 | 15 | 42 |
| 2017 | 41 | 51 |
| 2018 | 43 | 56 |
| 2019 | 60 | 87 |
| 2020 | 60 | 77 |
| 2021 | 76 | 68 |
| 2022 | 56 | 54 |
| 2023 | 63 | 48 |
| 2024 | 53 | 31 |
| 2025 | 37 | 30 |
| 2026 | 17 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for CO2 microbubble flooding15 Sep 2026US 12,734,490 B2Dalian University of Technology
- Polymer of 2-acrylamido-2-methylpropane sulphonic acid and use thereof30 Jun 2026US 12,668,648 B2Snf Group
- Completion fluid for injection into wellbore23 Jun 2026US 12,662,620 B1King Fahd University of Petroleum and Minerals
- Manufacturing method for inverse emulsion polymer2 Jun 2026US 12,643,961 B2TouGas Holding GmbH
- Compositions and methods for pressure protection2 Jun 2026US 12,644,043 B2Chevron U.S.A.Inc.
- Method of using inverse emulsion polymer17 Sep 2026US 2026/0275003 A1TouGas Holding GmbH
- Method for injecting an aqueous polymer solution into an underground formation10 Sep 2026US 2026/0265603 A1Snf Group
- Fast-dissolving polyacrylamide for offshore oil displacement and preparation method thereof3 Sep 2026US 2026/0258294 A1Henan Zhengjia Green Energy Co., Ltd.
- Polymer flooding method using sequential injections of a solution of a polymer of hydrophilic monomers and a solution of an associative polymer20 Aug 2026US 2026/0242659 A1Snf Group
- Methods, systems, and compositions for in-situ foam generation for liquid unloading23 Jul 2026US 2026/0209595 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Composition and method for recovering hydrocarbon fluids from a subterranean reservoir203US 6,454,003 B1Ondeo Nalco Energy Services, L.P. · 2002
- Polymeric well treating method191US 4,532,052 AHalliburton Company · 1985
- Method of increasing the yield of hydrocarbons from a subterranean formation167US 4,508,170 A1985
- Profile control in enhanced oil recovery131US 5,103,909 AShell Oil Company · 1992
- Water-dispersible hydrophobic thickening agent122US 4,432,881 AThe Dow Chemical Company · 1984