F04B 53/20
Filtering
F04B53/20 (Filtering) appears on 229 US grants and 281 published applications in this corpus.
Search patents in F04B- Granted patents
- 229
- Published applications
- 281
- Assignees
- 171
- Inventors
- 568
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 1 |
| 2002 | 1 | 5 |
| 2003 | 6 | 3 |
| 2004 | 3 | 3 |
| 2005 | 0 | 2 |
| 2006 | 3 | 6 |
| 2007 | 3 | 2 |
| 2008 | 1 | 3 |
| 2009 | 1 | 5 |
| 2010 | 4 | 5 |
| 2011 | 1 | 7 |
| 2012 | 2 | 8 |
| 2013 | 5 | 11 |
| 2014 | 8 | 16 |
| 2015 | 4 | 19 |
| 2016 | 7 | 7 |
| 2017 | 11 | 12 |
| 2018 | 6 | 16 |
| 2019 | 20 | 36 |
| 2020 | 15 | 23 |
| 2021 | 23 | 19 |
| 2022 | 21 | 23 |
| 2023 | 25 | 9 |
| 2024 | 13 | 19 |
| 2025 | 19 | 14 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquid feeding device and inkjet recording apparatus15 Sep 2026US 12,736,043 B2KYOCERA Document Solutions Inc.
- Sump filter w/ c.o.d5 May 2026US 12,618,405 B2
- Integrated solar fountain, and manufacturing and assembly method therefor31 Mar 2026US 12,590,576 B1
- Piezoelectric pump device having movable filter arrangement30 Dec 2025US 12,510,066 B2Murata Manufacturing Co., Ltd.
- Filter device for air compressor16 Dec 2025US 12,497,960 B1Dongguan Hesheng Machinery & Electric Co., Ltd.
- Split-architecture high-pressure gas compressor system and method8 Oct 2026US 2026/0309138 A1Arctic Compressor, LLC
- Hydraulic mechanical pumping unit with a ventilation duct for electronic components and a damping filtration system27 Aug 2026US 2026/0251138 A1
- Reciprocating Pump Packing Lubricator30 Apr 2026US 2026/0117766 A1Bill Spitzer & Associates
- Magnetic debris filter for compressor and compressor with magnetic debris filter19 Mar 2026US 2026/0078757 A1Mahle International GmbH
- Electrochemical compression for hydrogen recovery and high plant yield in ammonia synthesis processes26 Feb 2026US 2026/0054217 A1Ohmium International, Inc.
Most cited
By later US patents
- Multichannel pump apparatus with microflow rate capability71US 5,630,706 A1997
- Dual stage pump system with pre-stressed diaphragms and reservoir65US 5,490,765 ACybor Corporation · 1996
- Mixing apparatus for microflow gradient pumping55US 5,664,938 A1997
- Dual stage pump system with pre-stressed diaphragms and reservoir50US 6,190,565 B12001
- Dual stage pump and filter system with control valve between pump stages48US 5,762,795 ACybor Corporation · 1998