B01D 2011/002
Counter-current extraction
Official title: {Counter-current extraction}
B01D2011/002 (Counter-current extraction) appears on 117 US grants and 89 published applications in this corpus.
Search patents in B01D- Granted patents
- 117
- Published applications
- 89
- Assignees
- 92
- Inventors
- 286
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 2 | 8 |
| 2016 | 2 | 9 |
| 2017 | 8 | 10 |
| 2018 | 7 | 6 |
| 2019 | 6 | 7 |
| 2020 | 9 | 6 |
| 2021 | 4 | 7 |
| 2022 | 6 | 7 |
| 2023 | 2 | 5 |
| 2024 | 5 | 5 |
| 2025 | 2 | 7 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Continuous liquid-liquid chromatographic separation of chemical species using multiple liquid phases and related systems and articles18 Aug 2026US 12,708,864 B2Zaiput Flow Technologies LLC
- Extraction of guayule resin28 Jul 2026US 12,691,391 B2Bridgestone Corporation
- Liquid-liquid extraction device16 Jun 2026US 12,654,114 B2Refine Holdings Co., Ltd.
- Feedstock processing method and system16 Jun 2026US 12,655,354 B2Defugo Techologies Pte Ltd
- Countercurrent extraction device for spinning3 Mar 2026US 12,564,797 B2Zhejiang Aegis New Materials Co., Ltd.
- Extraction column with alternating spillway sections3 Sep 2026US 2026/0257148 A1Ifp Energies Nouvelles
- Systems and techniques for controlling fouling solids when extracting oleaginous material using an alcohol6 Aug 2026US 2026/0226366 A1Crown Iron Works Company
- Apparatus and processes for solvent extraction of coal26 Feb 2026US 2026/0054196 A1
- Method for selectively extracting a salt to be extracted from saltwater or brine12 Feb 2026US 2026/0042036 A1Adionics
- Process For Production Of Essentially Pure Delta-9-Tetrahydrocannabinol4 Dec 2025US 2025/0367161 A1Cct Sciences, LLC
Most cited
By later US patents
- Alkali metal catalyst recovery process61US 3,998,607 AExxon Research & Engineering Co. · 1976
- Process and apparatus for cleaning particulate solids53US 5,053,082 AConoco Inc. · 1991
- Process for treating a slurry of cellulosic material45US 4,046,621 ACanadian International Paper Company · 1977
- Solvent extraction process41US 4,189,376 AChevron Research Company · 1980
- Leaching and washing a flocculated slurry having a fiber content33US 4,557,905 AKamyr, Inc. · 1985