B01D 2201/00
Details relating to filtering apparatus
B01D2201/00 (Details relating to filtering apparatus) appears on 6,775 US grants and 6,385 published applications in this corpus.
Search patents in B01D- Granted patents
- 6,775
- Published applications
- 6,385
- Assignees
- 2,816
- Inventors
- 11,189
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 41 | 0 |
| 1977 | 58 | 0 |
| 1978 | 56 | 0 |
| 1979 | 57 | 0 |
| 1980 | 54 | 0 |
| 1981 | 77 | 0 |
| 1982 | 50 | 0 |
| 1983 | 42 | 0 |
| 1984 | 58 | 0 |
| 1985 | 75 | 0 |
| 1986 | 76 | 0 |
| 1987 | 89 | 0 |
| 1988 | 76 | 0 |
| 1989 | 91 | 0 |
| 1990 | 68 | 0 |
| 1991 | 85 | 0 |
| 1992 | 85 | 0 |
| 1993 | 101 | 0 |
| 1994 | 85 | 0 |
| 1995 | 118 | 0 |
| 1996 | 100 | 0 |
| 1997 | 126 | 0 |
| 1998 | 158 | 0 |
| 1999 | 155 | 0 |
| 2000 | 118 | 0 |
| 2001 | 151 | 45 |
| 2002 | 143 | 175 |
| 2003 | 147 | 220 |
| 2004 | 135 | 217 |
| 2005 | 145 | 190 |
| 2006 | 125 | 182 |
| 2007 | 100 | 178 |
| 2008 | 89 | 160 |
| 2009 | 80 | 199 |
| 2010 | 108 | 196 |
| 2011 | 125 | 175 |
| 2012 | 170 | 195 |
| 2013 | 126 | 226 |
| 2014 | 133 | 210 |
| 2015 | 149 | 224 |
| 2016 | 153 | 238 |
| 2017 | 171 | 288 |
| 2018 | 216 | 336 |
| 2019 | 278 | 329 |
| 2020 | 324 | 449 |
| 2021 | 262 | 405 |
| 2022 | 310 | 388 |
| 2023 | 304 | 319 |
| 2024 | 287 | 333 |
| 2025 | 275 | 293 |
| 2026 | 170 | 215 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2201/40Special measures for connecting different parts of the filterIndexing code1,803
- B01D 2201/30Filter housing constructionsIndexing code1,670
- B01D 2201/04Supports for the filtering elementsIndexing code1,365
- B01D 2201/29Filter cartridge constructionsIndexing code1,125
- B01D 2201/34Seals or gaskets for filtering elementsIndexing code1,088
- B01D 2201/18Filters characterised by the openings or poresIndexing code555
- B01D 2201/28Position of the filtering elementIndexing code470
- B01D 2201/08Regeneration of the filterIndexing code358
All 33 subgroupsShow fewer
- B01D 2201/16ValvesIndexing code342
- B01D 2201/12Pleated filtersIndexing code332
- B01D 2201/20Pressure-related systems for filtersIndexing code323
- B01D 2201/02Filtering elements having a conical formIndexing code305
- B01D 2201/31Details relating to filtering apparatus: other construction detailsIndexing code240
- B01D 2201/24Tools used for the removal of filtersIndexing code223
- B01D 2201/52Filter identification meansIndexing code178
- B01D 2201/54Computerised or programmable systemsIndexing code160
- B01D 2201/56Wireless systems for monitoring the filterIndexing code141
- B01D 2201/48Overflow systemsIndexing code111
- B01D 2201/50Means for dissipating electrostatic chargesIndexing code109
- B01D 2201/46Several filtrate discharge conduits each connected to one filter element or groupIndexing code88
- B01D 2201/26Transport systems for filtering devicesIndexing code86
- B01D 2201/44Special measures allowing the even or uniform distribution of fluid along theIndexing code85
- B01D 2201/60Shape of non-cylindrical filtering elementsIndexing code83
- B01D 2201/58Power supply means for regenerating the filterIndexing code62
- B01D 2201/32Flow characteristics of the filterIndexing code61
- B01D 2201/10Filtration under gravity in large open drainage basinsIndexing code38
- B01D 2201/14Particulate filter materials with a lower density than the liquid mixture toIndexing code31
- B01D 2201/64Filters having floating elementsIndexing code30
- B01D 2201/06Resilient foam as filtering elementIndexing code25
- B01D 2201/62Honeycomb-likeIndexing code23
- B01D 2201/36Filtering elements containing a rotating housing constructionIndexing code10
- B01D 2201/22Filtering bands with supporting discsIndexing code7
- B01D 2201/38Preventing rewetting of the filter cake on the filter mediaIndexing code7
Recent patents
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- Water filter priming pump8 Oct 2026US 2026/0306973 A1
- Filter assemblies and related filter elements8 Oct 2026US 2026/0306974 A1Donaldson Company, Inc.
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Most cited
By later US patents
- Inline filter apparatus526US 5,820,646 ADonaldson Company, Inc. · 1998
- Fluid filter system524US 8,272,516 B2Advanced Filtration Systems Inc. · 2012
- Disposable vacuum filtration apparatus capable of detecting microorganisms and particulates in liquid samples489US 6,913,152 B22005
- Stormwater filter assembly483US 8,110,099 B2Contech Stormwater Solutions Inc. · 2012
- Filter element incorporating a handle member390US 6,235,195 B1Donaldson Company, Inc. · 2001