B01D 2273/30
Means for generating a circulation of a fluid in a filtration system
Official title: Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
B01D2273/30 (Means for generating a circulation of a fluid in a filtration system) appears on 656 US grants and 856 published applications in this corpus.
Search patents in B01D- Granted patents
- 656
- Published applications
- 856
- Assignees
- 445
- Inventors
- 1,883
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 10 | 0 |
| 1994 | 10 | 0 |
| 1995 | 11 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 16 | 4 |
| 2002 | 15 | 11 |
| 2003 | 16 | 17 |
| 2004 | 12 | 17 |
| 2005 | 10 | 18 |
| 2006 | 4 | 17 |
| 2007 | 5 | 13 |
| 2008 | 8 | 9 |
| 2009 | 2 | 10 |
| 2010 | 10 | 15 |
| 2011 | 6 | 10 |
| 2012 | 6 | 8 |
| 2013 | 10 | 12 |
| 2014 | 7 | 15 |
| 2015 | 5 | 10 |
| 2016 | 12 | 15 |
| 2017 | 18 | 35 |
| 2018 | 8 | 19 |
| 2019 | 19 | 35 |
| 2020 | 27 | 46 |
| 2021 | 34 | 98 |
| 2022 | 44 | 125 |
| 2023 | 65 | 113 |
| 2024 | 69 | 75 |
| 2025 | 55 | 59 |
| 2026 | 50 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air filtration apparatus and system for providing patient information6 Oct 2026US 12,752,071 B2ResMed Pty Ltd
- Air conditioning and filtration system29 Sep 2026US 12,746,502 B2Work Air Technologies Pty Ltd
- Air cleaner29 Sep 2026US 12,747,888 B2LG Electronics Inc.
- Air cleaner15 Sep 2026US 12,736,250 B2LG Electronics Inc.
- Air purifier15 Sep 2026US 12,736,443 B2Samsung Electronics Co., Ltd.
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- System and method for air decontamination24 Sep 2026US 2026/0284251 A1
- Communicating filter plants27 Aug 2026US 2026/0249226 A1Kappa Filter Systems GmbH
- Mobile pcr systems, mobile reverse pcr hoods and related methods27 Aug 2026US 2026/0249283 A1Radeas, LLC
- Air Purifier27 Aug 2026US 2026/0251347 A1Shenzhen Chenbei Technology Co., Ltd.
Most cited
By later US patents
- Technique for detecting and predicting air filter condition198US 7,261,762 B2Carrier Corporation · 2007
- Air purification system185US 5,997,619 ANQ Environmental, Inc. · 1999
- Air purifier177US 6,494,940 B1Hamilton Beach/Proctor-Silex, Inc. · 2002
- Room air treatment system175US 4,737,173 AAmway Corporation · 1988
- Air filter monitor for HVAC units164US 6,448,896 B1Carrier Corporation · 2002