C02F 11/131
Using electromagnetic or ultrasonic waves
Official title: using electromagnetic or ultrasonic waves
C02F11/131 (Using electromagnetic or ultrasonic waves) appears on 51 US grants and 42 published applications in this corpus.
Search patents in C02F- Granted patents
- 51
- Published applications
- 42
- Assignees
- 43
- Inventors
- 126
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 3 |
| 2003 | 2 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 5 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 3 | 2 |
| 2014 | 2 | 3 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 5 |
| 2019 | 0 | 3 |
| 2020 | 4 | 1 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 3 |
| 2025 | 2 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for biological transformation, concentration, and recovery of selenium from wastewater14 Apr 2026US 12,600,654 B2Arizona Board of Regents on behalf of Arizona State University
- Water management system for ore mining operation18 Nov 2025US 12,473,219 B2Extrakt Process Solutions, LLC
- Treatment method for complete harmless treatment of activated sludge and complete resource utilization of activated sludge's products8 Apr 2025US 12,269,763 B1
- Curing and inoculation of pasteurized digestate15 Oct 2024US 12,116,297 B2
- Waste disposer28 Feb 2023US 11,590,544 B2
- Sludge high-dry dewatering device with synchronous online detection of pore size and moisture content2 Jul 2026US 2026/0184616 A1China Jiliang University
- System for drying sludge as well as sludge turner25 Jul 2024US 2024/0246848 A1Huber SE
- Waste treatment apparatus and method9 May 2024US 2024/0150210 A1Sem Energy Limited
- Systems and methods for biological transformation, concentration, and recovery of selenium from wastewater28 Mar 2024US 2024/0101456 A1Arizona Board of Regents on behalf of Arizona State University
- Water management system for ore mining operation11 May 2023US 2023/0143928 A1Extrakt Process Solutions, LLC
Most cited
By later US patents
- Process and system for wastewater solids gasification and vitrification65US 6,398,921 B1MicroGas Corporation · 2002
- Method of transforming sludge into ecologically acceptable solid material63US 4,079,003 A1978
- Sewage treatment method and apparatus34US 4,592,291 ARed Fox Industries Inc. · 1986
- Method and apparatus for treating sumps30US 4,028,240 A1977
- Method and apparatus for dewatering previously-dewatered municipal waste-water sludges using high electrical voltages29US 6,030,538 A2000