C02F 11/125
Using screw filters
Official title: using screw filters
C02F11/125 (Using screw filters) appears on 110 US grants and 150 published applications in this corpus.
Search patents in C02F- Granted patents
- 110
- Published applications
- 150
- Assignees
- 103
- Inventors
- 311
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 2 | 2 |
| 2007 | 1 | 3 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 5 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 5 |
| 2014 | 1 | 7 |
| 2015 | 1 | 11 |
| 2016 | 2 | 11 |
| 2017 | 6 | 5 |
| 2018 | 8 | 9 |
| 2019 | 3 | 9 |
| 2020 | 10 | 13 |
| 2021 | 13 | 10 |
| 2022 | 9 | 10 |
| 2023 | 6 | 19 |
| 2024 | 12 | 14 |
| 2025 | 12 | 5 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Assemblies and methods for material extraction from retention collections11 Aug 2026US 12,703,585 B2Industrial Vacuum Transfer Services USA, LLC
- Assemblies and methods for material extraction from retention collections28 Jul 2026US 12,692,102 B2Industrial Vacuum Transfer Services USA, LLC
- Multi-plate or laminated screw press10 Mar 2026US 12,569,787 B2
- Method for compression of aqueous slurry containing solid foreign matter and paper dust, and treatment method of waste gypsum board24 Feb 2026US 12,559,380 B2Tokuyama Corporation
- Method of separating waste into bio-available components17 Feb 2026US 12,552,697 B1
- Assemblies and methods for material extraction from retention collections24 Sep 2026US 2026/0285620 A1Industrial Vacuum Transfer Services USA, LLC
- Separator device for dewatering wet matter4 Jun 2026US 2026/0151977 A1Vogelsang GmbH & Co. KG
- System and process for reducing pfas and microplastics in biosolids using hydrodynamic cavitation and foam fractionation12 Mar 2026US 2026/0070854 A1Merrell Bros., Inc.
- System and process for reducing pfas and microplastics in biosolids using hydrodynamic cavitation and foam fractionation6 Nov 2025US 2025/0340473 A1Merrell Bros., Inc.
- Mechanical Sludge Thickener System and Method Thereof16 Oct 2025US 2025/0320147 A1
Most cited
By later US patents
- Process and system for wastewater solids gasification and vitrification65US 6,398,921 B1MicroGas Corporation · 2002
- Device for compacting and draining fluid sludges containing fibrous materials30US 4,260,488 ASociete Generale de Constructions Electriques et Mecaniques (ALSTHOM) · 1981
- Mechanical dewatering process utilizing a nonuniform screw conveyor25US 4,380,496 AUop LLC · 1983
- Continuously and automatically functioning device for the drainage of sludge, especially of sewage sludge21US 5,122,263 A1992
- Method for dewatering sludge or slurry17US 4,913,771 A1990