C02F 1/481
Using permanent magnets
Official title: {using permanent magnets}
C02F1/481 (Using permanent magnets) appears on 413 US grants and 405 published applications in this corpus.
Search patents in C02F- Granted patents
- 413
- Published applications
- 405
- Assignees
- 244
- Inventors
- 762
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 11 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 12 | 0 |
| 1999 | 16 | 0 |
| 2000 | 13 | 0 |
| 2001 | 13 | 4 |
| 2002 | 6 | 3 |
| 2003 | 7 | 8 |
| 2004 | 11 | 14 |
| 2005 | 7 | 11 |
| 2006 | 2 | 54 |
| 2007 | 6 | 16 |
| 2008 | 9 | 14 |
| 2009 | 9 | 14 |
| 2010 | 6 | 12 |
| 2011 | 5 | 8 |
| 2012 | 9 | 11 |
| 2013 | 5 | 8 |
| 2014 | 4 | 12 |
| 2015 | 9 | 12 |
| 2016 | 7 | 17 |
| 2017 | 9 | 19 |
| 2018 | 12 | 19 |
| 2019 | 12 | 26 |
| 2020 | 8 | 22 |
| 2021 | 15 | 32 |
| 2022 | 19 | 21 |
| 2023 | 12 | 14 |
| 2024 | 26 | 12 |
| 2025 | 12 | 19 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Repelling magnet assembly25 Aug 2026US 12,714,873 B1
- Flocculation cyclone device, marine plastic removal system using the same, ship provided with the system, and operation method for the ship16 Jun 2026US 12,654,179 B2Ambitious Technologies, LTD.
- Magnetic treatment of fluids to be used in the production of alcoholic beverages with hydromagnetic resonators2 Jun 2026US 12,644,081 B1NEAU Brands, Inc.
- Multi-stage apparatus for producing magnetized water14 Apr 2026US 12,600,650 B2
- Device with diameteral magnetic arrays for installation in magnetic subs for the remediation and mitigation of scale in production columns17 Mar 2026US 12,580,112 B2Centro Brasileiro De Pesquisas Físicas
- Magnetic molecular resonator for water and other fluids20 Aug 2026US 2026/0242259 A1
- Urea processing apparatus and urea processing method20 Aug 2026US 2026/0242261 A1Samsung Electronics Co., Ltd.
- Altering properties of a fluid and magnetically assisted desalination6 Aug 2026US 2026/0225927 A1
- Fluid treatment system, separator and method using a magnetic field25 Dec 2025US 2025/0387732 A1RJ Enterprises, Inc.
- A water treatment unit18 Dec 2025US 2025/0381571 A1International Water Treatment Maritime AS
Most cited
By later US patents
- Method and apparatus for treating cooling tower water124US 4,764,283 A1988
- Method of an apparatus for sterilizing aqueous media, more particularly drinking water122US 4,857,204 A1989
- Method of and apparatus for producing potable water and salt95US 6,030,535 AYukiko Hayashi · 2000
- Method and apparatus for treating water in a cooling system80US 5,145,585 A1992
- Apparatus for magnetically treating liquid flowing through a pipe and clamping means therefor65US 4,367,143 AAqua Magnetics, Inc. · 1983