C02F 11/004
Sludge detoxification
Official title: {Sludge detoxification}
C02F11/004 (Sludge detoxification) appears on 170 US grants and 94 published applications in this corpus.
Search patents in C02F- Granted patents
- 170
- Published applications
- 94
- Assignees
- 132
- Inventors
- 461
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 10 | 0 |
| 1992 | 9 | 0 |
| 1993 | 12 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 2 |
| 2004 | 2 | 0 |
| 2005 | 3 | 0 |
| 2006 | 0 | 4 |
| 2007 | 2 | 3 |
| 2008 | 2 | 1 |
| 2009 | 0 | 6 |
| 2010 | 2 | 3 |
| 2011 | 2 | 0 |
| 2012 | 3 | 3 |
| 2013 | 1 | 4 |
| 2014 | 2 | 6 |
| 2015 | 2 | 3 |
| 2016 | 2 | 3 |
| 2017 | 3 | 3 |
| 2018 | 3 | 4 |
| 2019 | 2 | 3 |
| 2020 | 3 | 4 |
| 2021 | 2 | 6 |
| 2022 | 5 | 7 |
| 2023 | 2 | 7 |
| 2024 | 6 | 8 |
| 2025 | 12 | 5 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for treating waters, sediments and/or sludges24 Feb 2026US 12,559,400 B2OASE GmbH
- Method for manufacturing useful products containing carbonized solids by treating organic wastes containing heavy metals27 Jan 2026US 12,533,719 B2Matsui Consulting Firm Co., Ltd.
- System and process for reducing PFAS and microplastics in biosolids using hydrodynamic cavitation and foam fractionation4 Nov 2025US 12,459,846 B1Merrell Bros., Inc.
- Neutralization processing system for ammonia-containing waste fluid and neutralization processing method for ammonia-containing waste fluid14 Oct 2025US 12,441,639 B2Mitsubishi Kakoki Kaisha, Ltd.
- Process of extraction of metals from a wet mass of waste30 Sep 2025US 12,428,703 B2Hbi S.R.L.
- Processing Of Phosphate Solutions6 Aug 2026US 2026/0225888 A1Easymining Sweden AB
- Stormwater Waste Decanting Process Utilizing Clinoptilolite Zeolite Powder and Granules for Faster and more Efficient Liquid Separation and Toxin Encapsulation30 Jul 2026US 2026/0217585 A1Agrinutrient, LLC
- Neutralization processing system for ammonia-containing waste fluid and neutralization processing method for ammonia-containing waste fluid23 Apr 2026US 2026/0109635 A1Mitsubishi Kakoki Kaisha, Ltd.
- System and process for reducing pfas and microplastics in biosolids using hydrodynamic cavitation and foam fractionation12 Mar 2026US 2026/0070854 A1Merrell Bros., Inc.
- Treatment method for full resource recovery from sludge in municipal wastewater treatment plants12 Feb 2026US 2026/0042692 A1Shanghai Jiao Tong University
Most cited
By later US patents
- Indirectly heated thermochemical reactor apparatus and processes143US 5,059,404 AManufacturing and Technology Conversion International, Inc. · 1991
- Process for detoxifying waste materials by steam reformation through endothermic gasification reactions104US 6,149,765 AManufacturing and Technology Conversion International, Inc. · 2000
- Indirectly heated thermochemical reactor apparatus and processes101US 5,306,481 AManufacturing and Technology Conversion International, Inc. · 1994
- Endothermic spent liquor recovery process89US 5,637,192 AManufacturing and Technology Conversion International, Inc. · 1997
- Wastewater energy recycling method81US 4,159,944 A1979