C10G 21/28
Recovery of used solvent
C10G21/28 (Recovery of used solvent) appears on 227 US grants and 201 published applications in this corpus.
Search patents in C10G- Granted patents
- 227
- Published applications
- 201
- Assignees
- 109
- Inventors
- 560
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 5 |
| 2004 | 2 | 1 |
| 2005 | 2 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 0 | 10 |
| 2010 | 4 | 10 |
| 2011 | 2 | 14 |
| 2012 | 7 | 18 |
| 2013 | 14 | 9 |
| 2014 | 14 | 28 |
| 2015 | 12 | 12 |
| 2016 | 15 | 6 |
| 2017 | 13 | 11 |
| 2018 | 11 | 7 |
| 2019 | 9 | 9 |
| 2020 | 10 | 8 |
| 2021 | 8 | 11 |
| 2022 | 9 | 5 |
| 2023 | 2 | 11 |
| 2024 | 4 | 8 |
| 2025 | 8 | 8 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for removing contaminants from crude oil7 Apr 2026US 12,595,426 B2Shell USA, Inc.
- Process for recovery of pyrolysis oil extraction solvent17 Feb 2026US 12,551,822 B2Uop LLC
- Separation method of high-temperature Fischer-Tropsch synthetic light oil2 Dec 2025US 12,486,463 B2Yankuang Energy R&D Co., Ltd.
- Recovery of aliphatic hydrocarbons18 Nov 2025US 12,473,505 B2Shell USA, Inc.
- Solvent extraction system and process for hydrothermal liquefaction4 Nov 2025US 12,460,139 B2Battelle Memorial Institute
- Method for liquid-liquid extraction of aromatics with extract recycles streams20 Aug 2026US 2026/0242675 A1Ifp Energies Nouvelles
- Energy-efficient process for separating butenes from c4-hyrocarbons streams9 Jul 2026US 2026/0193156 A1Evonik Oxeno GmbH
- Method for the purification of a plastic liquefaction oil composition11 Jun 2026US 2026/0159763 A1Totalenergies Onetech
- Method for stepwise extraction of phenol and pyridine compounds in naphthalene oil by deep eutectic solvents16 Apr 2026US 2026/0103641 A1Shanxi Research Institute of Huairou Laboratory
- Method for preparing low-pour point, high-aromatic, and environmental-friendly rubber oil by combining extraction and dewaxing29 Jan 2026US 2026/0028541 A1China University of Petroleum (East China)
Most cited
By later US patents
- Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations68US 8,151,907 B2Shell Oil Company · 2012
- Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations62US 8,177,305 B2Shell Oil Company · 2012
- Solvent deasphalting59US 4,239,616 AKerr-McGee Refining Corporation · 1980
- Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations57US 8,172,335 B2Shell Oil Company · 2012
- Using tunnels for treating subsurface hydrocarbon containing formations54US 8,162,405 B2Shell Oil Company · 2012