B01D 27/101
Filter condition indicators
Official title: {Filter condition indicators}
B01D27/101 (Filter condition indicators) appears on 29 US grants and 50 published applications in this corpus.
Search patents in B01D- Granted patents
- 29
- Published applications
- 50
- Assignees
- 27
- Inventors
- 83
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 9 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 1 | 3 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 3 | 3 |
| 2016 | 1 | 2 |
| 2017 | 3 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 5 |
| 2020 | 2 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electronic device and method for detecting filter status10 Feb 2026US 12,546,715 B2ASUSTeK COMPUTER INC.
- Security system for fluid filtration device15 Oct 2024US 12,115,477 B2Aerobiotix, Inc.
- Security system for fluid filtration device9 Aug 2022US 11,406,922 B2Aerobiotix, Inc.
- Filtering device and control system26 Oct 2021US 11,154,797 B2Bestway Inflatables & Material Corp.
- Disposable filter including an integrated sensor assembly24 Aug 2021US 11,097,210 B2Neapco Intellectual Property Holdings, LLC
- Systems for detection of bypass valve actuation using pressure data13 Aug 2026US 2026/0233130 A1Donaldson Company, Inc.
- Micro-fibre filter cartridge and filter unit23 Jul 2026US 2026/0208078 A1
- A filter medium contamination detection structure, a filter device, and a filter with abnormal warning function13 Feb 2025US 2025/0050246 A1Intex Marketing Ltd.
- Security system for fluid filtration device2 Jan 2025US 2025/0001337 A1Aerobiotix, Inc.
- Electronic device and method for detecting filter status28 Nov 2024US 2024/0393240 A1ASUSTeK COMPUTER INC.
Most cited
By later US patents
- Identification of filter media within a filtration system255US 10,143,948 B23M Innovative Properties Company · 2018
- Engine coolant filter84US 5,382,355 A1995
- System for monitoring the performance of fluid treatment cartridges72US 7,638,042 B23M Innovative Properties Company · 2009
- Pressure sensing fluid filter system35US 6,652,740 B2Honeywell International Inc. · 2003
- Plastic oil filter assembly34US 5,182,015 AAlberee Ltd., Inc. · 1993