C09K 8/74
Combined with additives added for specific purposes
Official title: combined with additives added for specific purposes
C09K8/74 (Combined with additives added for specific purposes) appears on 994 US grants and 979 published applications in this corpus.
Search patents in C09K- Granted patents
- 994
- Published applications
- 979
- Assignees
- 203
- Inventors
- 1,433
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 5 | 0 |
| 1978 | 14 | 0 |
| 1979 | 10 | 0 |
| 1980 | 19 | 0 |
| 1981 | 9 | 0 |
| 1982 | 11 | 0 |
| 1983 | 3 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 12 | 0 |
| 1988 | 9 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 6 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 9 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 0 |
| 2002 | 7 | 9 |
| 2003 | 11 | 18 |
| 2004 | 9 | 14 |
| 2005 | 9 | 24 |
| 2006 | 12 | 36 |
| 2007 | 23 | 20 |
| 2008 | 20 | 36 |
| 2009 | 17 | 29 |
| 2010 | 36 | 28 |
| 2011 | 25 | 30 |
| 2012 | 15 | 34 |
| 2013 | 19 | 32 |
| 2014 | 23 | 51 |
| 2015 | 33 | 45 |
| 2016 | 21 | 72 |
| 2017 | 45 | 63 |
| 2018 | 59 | 67 |
| 2019 | 60 | 70 |
| 2020 | 58 | 67 |
| 2021 | 67 | 57 |
| 2022 | 65 | 26 |
| 2023 | 48 | 49 |
| 2024 | 36 | 40 |
| 2025 | 23 | 40 |
| 2026 | 33 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of using tracer compositions having a degradable polymer and a detectable component for tracing gas flow in a hydrocarbon reservoir22 Sep 2026US 12,742,383 B2Saudi Arabian Oil Company
- Single-phase retarded acid systems using amino acids15 Sep 2026US 12,735,627 B2Schlumberger Technology Corporation
- Aqueous modified acid compositions and methods of using the same25 Aug 2026US 12,716,021 B2Dorf Ketal Chemicals Fze
- Method for single-stage treatment of siliceous subterranean formations25 Aug 2026US 12,716,022 B2Schlumberger Technology Corporation
- Methods for enhancing the permeability of reactive rock reservoirs25 Aug 2026US 12,716,340 B2Saudi Arabian Oil Company
- Composition and methods for inhibiting corrosion of metal during acidizing a wellbore in a subterranean formation for fracking24 Sep 2026US 2026/0286211 A1
- Bis-pyridinium compounds, materials including such, and uses thereof such as in corrosion resistance17 Sep 2026US 2026/0274796 A1Saudi Arabian Oil Company
- Method for single-stage treatment of siliceous subterranean formations13 Aug 2026US 2026/0234465 A1Schlumberger Technology Corporation
- Low viscosity polymer-based retarded acid13 Aug 2026US 2026/0234466 A1Schlumberger Technology Corporation
- Composition and methods for inhibiting corrosion of metal during acidizing a wellbore in a subterranean formation for fracking9 Jul 2026US 2026/0193523 A1
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
- Thickened acidic aqueous compositions using cross-linked dialkylaminoacrylic microparticles202US 5,100,660 AAllied Colloids Limited · 1992