B01D 11/0426
Counter-current multistage extraction towers in a vertical or sloping position
Official title: {Counter-current multistage extraction towers in a vertical or sloping position}
B01D11/0426 (Counter-current multistage extraction towers in a vertical or sloping position) appears on 262 US grants and 209 published applications in this corpus.
Search patents in B01D- Granted patents
- 262
- Published applications
- 209
- Assignees
- 174
- Inventors
- 622
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 9 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 2 |
| 2002 | 5 | 4 |
| 2003 | 7 | 3 |
| 2004 | 3 | 3 |
| 2005 | 2 | 3 |
| 2006 | 1 | 3 |
| 2007 | 2 | 3 |
| 2008 | 2 | 5 |
| 2009 | 1 | 9 |
| 2010 | 4 | 8 |
| 2011 | 5 | 7 |
| 2012 | 5 | 11 |
| 2013 | 11 | 11 |
| 2014 | 6 | 18 |
| 2015 | 13 | 16 |
| 2016 | 11 | 10 |
| 2017 | 13 | 10 |
| 2018 | 9 | 6 |
| 2019 | 13 | 13 |
| 2020 | 5 | 9 |
| 2021 | 7 | 6 |
| 2022 | 6 | 15 |
| 2023 | 14 | 10 |
| 2024 | 6 | 7 |
| 2025 | 5 | 11 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Liquid-liquid extraction device16 Jun 2026US 12,654,114 B2Refine Holdings Co., Ltd.
- Method for purifying an aqueous-alcoholic feedstock comprising ethanol and acetaldehyde5 May 2026US 12,616,917 B2Compagnie Generale Des Etablissements Michelin
- Process for preparing a high-purity nickel sulphate solution10 Mar 2026US 12,570,542 B2Umicore AG & Co. KG
- Integrated production process of tert-butyl ethers of glycerol or isooctene stream13 Jan 2026US 12,522,553 B2Petroleo Brasileiro S.A. - Petrobras
- Extraction column with alternating spillway sections3 Sep 2026US 2026/0257148 A1Ifp Energies Nouvelles
- Method for producing an aqueous solution of 5-hydroxymethylfurfural comprising a liquid-liquid extraction step incorporating or followed by filtration23 Jul 2026US 2026/0208070 A1Ifp Energies Nouvelles
- Apparatus and method for treating a flow of a substance to be treated by means of a counterflow of an extracting substance9 Jul 2026US 2026/0192214 A1Bob Service Srl
- Pad surface regeneration and metal recovery5 Mar 2026US 2026/0061548 A1Chempower Corporation
- Apparatus and processes for solvent extraction of coal26 Feb 2026US 2026/0054196 A1
Most cited
By later US patents
- Electric field-driven, magnetically-stabilized ferro-emulsion phase contactor87US 4,941,959 AMartin Marietta Energy Systems, Inc. · 1990
- Apparatus for distribution separation processes48US 4,208,284 A1980
- Liquid-liquid contactor39US 5,393,429 AJgc Corporation · 1995
- Liquid-liquid extraction apparatus including fibrous strand packing38US 3,989,466 A1976
- Countercurrent liquid-liquid contacting apparatus35US 4,491,565 AUop LLC · 1985