B01D 21/0009
Settling tanks making use of electricity or magnetism
Official title: {Settling tanks making use of electricity or magnetism (electric ultra filters B01D61/425; filters making use of electricity or magnetism B01D35/06; magnetic or electrostatic separation B03C)}
B01D21/0009 (Settling tanks making use of electricity or magnetism) appears on 270 US grants and 223 published applications in this corpus.
Search patents in B01D- Granted patents
- 270
- Published applications
- 223
- Assignees
- 166
- Inventors
- 488
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 11 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 8 |
| 2003 | 3 | 4 |
| 2004 | 4 | 7 |
| 2005 | 3 | 6 |
| 2006 | 4 | 4 |
| 2007 | 4 | 4 |
| 2008 | 4 | 5 |
| 2009 | 0 | 5 |
| 2010 | 5 | 4 |
| 2011 | 3 | 6 |
| 2012 | 4 | 10 |
| 2013 | 5 | 6 |
| 2014 | 6 | 17 |
| 2015 | 11 | 22 |
| 2016 | 11 | 15 |
| 2017 | 13 | 18 |
| 2018 | 14 | 14 |
| 2019 | 13 | 8 |
| 2020 | 10 | 13 |
| 2021 | 6 | 16 |
| 2022 | 16 | 8 |
| 2023 | 8 | 9 |
| 2024 | 8 | 7 |
| 2025 | 4 | 5 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bi-directional filter19 May 2026US 12,629,620 B2Combipro AS
- Vortex flow device for removing foreign matter from a liquid14 Oct 2025US 12,440,783 B2BUNRI Incorporation
- Passive gravity filter cell to reduce velocity and methods of use thereof14 Oct 2025US 12,441,636 B2Robby Galletta Enterprises LLC
- Industrialized fish and algae farming system and method with recirculating water5 Aug 2025US 12,376,572 B2Qinghai Photon Ecology Co., Ltd.
- Waste water management22 Jul 2025US 12,365,600 B2Nouvel Technologies, Inc.
- Residential hydronic magnetic, sediment, and air separation device with maintenance indicator14 Aug 2025US 2025/0256223 A1Fluid Handling LLC
- Tin production powered by geothermal energy17 Jul 2025US 2025/0230523 A1EnhancedGEO Holdings, LLC
- Tin production powered by geothermal energy17 Jul 2025US 2025/0230524 A1EnhancedGEO Holdings, LLC
- Water recovery systems and methods6 Feb 2025US 2025/0041775 A1Flow Environmental Corp.
- Systems and methods for enhanced inorganic contaminant removal from hydrocarbon feedstock9 Jan 2025US 2025/0011661 A1Marathon Petroleum Company LP
Most cited
By later US patents
- Separating constituents of a mixture of particles71US 4,874,507 A1989
- Method for enrichment of fetal cell population from maternal whole blood samples69US 5,676,849 ABioSeparations, Inc. · 1997
- Method and apparatus for sorting particles suspended in a fluid67US 5,715,946 A1998
- Electrical field-flow fractionation using redox couple added to carrier fluid65US 5,240,618 AUniversity of Utah Research Foundation · 1993
- Process and apparatus for electrocoagulative treatment of industrial waste water63US 5,928,493 AKaspar Electroplating Corporation · 1999