B01D 2275/20
Shape of filtering material
B01D2275/20 (Shape of filtering material) appears on 841 US grants and 900 published applications in this corpus.
Search patents in B01D- Granted patents
- 841
- Published applications
- 900
- Assignees
- 357
- Inventors
- 1,542
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 9 | 0 |
| 1996 | 11 | 0 |
| 1997 | 11 | 0 |
| 1998 | 14 | 0 |
| 1999 | 16 | 0 |
| 2000 | 16 | 0 |
| 2001 | 13 | 4 |
| 2002 | 11 | 12 |
| 2003 | 19 | 18 |
| 2004 | 15 | 19 |
| 2005 | 14 | 14 |
| 2006 | 11 | 18 |
| 2007 | 10 | 21 |
| 2008 | 13 | 29 |
| 2009 | 16 | 26 |
| 2010 | 16 | 40 |
| 2011 | 18 | 22 |
| 2012 | 25 | 30 |
| 2013 | 31 | 28 |
| 2014 | 28 | 29 |
| 2015 | 21 | 36 |
| 2016 | 26 | 44 |
| 2017 | 26 | 65 |
| 2018 | 27 | 43 |
| 2019 | 53 | 70 |
| 2020 | 49 | 55 |
| 2021 | 54 | 58 |
| 2022 | 55 | 54 |
| 2023 | 41 | 54 |
| 2024 | 52 | 59 |
| 2025 | 33 | 25 |
| 2026 | 22 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2275/206Special formsIndexing code253
- B01D 2275/201Conical shapeIndexing code242
- B01D 2275/208Oval shapeIndexing code179
- B01D 2275/203Shapes flexible in their geometryIndexing code140
- B01D 2275/205Rectangular shapeIndexing code57
- B01D 2275/202Disc-shaped filter elementsIndexing code34
- B01D 2275/207Triangular shapeIndexing code19
- B01D 2275/204Special shapes of loose filter materialsIndexing code3
Recent patents
- Filter unit with a filter block, a damping layer and a housing, and process of manufacturing such a filter unit6 Oct 2026US 12,752,136 B2Dräger Safety AG & Co. KGaA
- Filtration assembly and system29 Sep 2026US RE51,044 E1Walk Industrial, Inc.
- Method for manufacturing a metallic functional part delimiting a porous filtering medium, using an additive manufacturing method, and obtained functional part25 Aug 2026US 12,714,960 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Filter device for compressed air21 Jul 2026US 12,685,955 B2
- System for dehumidifying air2 Jun 2026US 12,643,069 B2Wilson Innovations & Consulting, LLC
- Automotive air filters with hydrocarbon-absorbing media8 Oct 2026US 2026/0306983 A1
- Stackable solid sorbent layers for gas separation and method of making1 Oct 2026US 2026/0295498 A1Mosaic Materials, Inc.
- Filter element and filter device3 Sep 2026US 2026/0257162 A1Mann+Hummel GmbH
- Filter element and filter device27 Aug 2026US 2026/0249224 A1Mann+Hummel GmbH
- Filter element and filter system27 Aug 2026US 2026/0249227 A1Mann+Hummel GmbH
Most cited
By later US patents
- Filter arrangement; sealing system; and methods402US 6,190,432 B1Donaldson Company, Inc. · 2001
- Conical filter341US 5,902,364 ADonaldson Company, Inc. · 1999
- Slanted inline filter319US 5,772,883 ADonaldson Company, Inc. · 1998
- Composite planar and triangularly pleated filter element307US 4,925,561 ATsuchiya Mfg. Co., Ltd. · 1990
- Filter arrangement; sealing system; and methods288US 6,350,291 B1Donaldson Company, Inc. · 2002