C02F 11/122
Using filter presses
Official title: using filter presses (C02F11/123 takes precedence)
C02F11/122 (Using filter presses) appears on 152 US grants and 214 published applications in this corpus.
Search patents in C02F- Granted patents
- 152
- Published applications
- 214
- Assignees
- 153
- Inventors
- 601
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 5 |
| 2011 | 1 | 6 |
| 2012 | 2 | 9 |
| 2013 | 2 | 6 |
| 2014 | 4 | 10 |
| 2015 | 4 | 7 |
| 2016 | 5 | 17 |
| 2017 | 9 | 9 |
| 2018 | 8 | 17 |
| 2019 | 8 | 13 |
| 2020 | 14 | 20 |
| 2021 | 13 | 17 |
| 2022 | 19 | 16 |
| 2023 | 13 | 15 |
| 2024 | 13 | 24 |
| 2025 | 12 | 11 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for fine particulate removal and processing from a coal combustion residual surface impoundment2 Jun 2026US 12,643,804 B2United Conveyor Corporation
- Synergistic device for resource and energy recovery, pollution reduction and carbon reduction of kitchen waste6 Jan 2026US 12,515,976 B2Beijing Jiaotong University
- Chemical looping gasification method for iron-rich sludge23 Dec 2025US 12,503,659 B2Shandong University of Science and Technology
- Method of dewatering11 Nov 2025US 12,466,752 B2Synata Bio, Inc.
- Fluidized bed separation method and device for methanol-to-olefins quenched water11 Nov 2025US 12,466,753 B2East China University of Science and Technology
- Method and System for Fine Particulate Removal and Processing from a Coal Combustion Residual Surface Impoundment24 Sep 2026US 2026/0285729 A1United Conveyor Corporation
- Method of processing drinking water treatment material20 Aug 2026US 2026/0242268 A1Reale Lime
- Filtration aid compositions and methods of use30 Jul 2026US 2026/0217582 A1Locus Solutions Ipco, LLC
- Sludge high-dry dewatering device with synchronous online detection of pore size and moisture content2 Jul 2026US 2026/0184616 A1China Jiliang University
- Method for preparing artificial peat and fulvic acid from livestock and poultry manure in breeding industry through high-pressure hydrothermal method18 Jun 2026US 2026/0167544 A1China University of Petroleum (East China)
Most cited
By later US patents
- Apparatus and system for treating waste water and sludge39US 4,880,533 A1989
- Treatment of gas well hydrofracture wastewaters27US 8,834,726 B2ProChemTech International, Inc. · 2014
- Auxiliary for dewatering of sludge25US 4,710,298 ASanyo Chemical Industries, Ltd. · 1987
- Process and apparatus for fixing, encapsulating, stabilizing and detoxifying heavy metals and the like in metal-containing sludges, soils, ash and similar materials25US 4,781,944 A1988
- Dewatering solids suspensions with controlled flocculant addition24US 4,675,116 AWater Research Centre · 1987