B01D 2239/00
Aspects relating to filtering material for liquid or gaseous fluids
B01D2239/00 (Aspects relating to filtering material for liquid or gaseous fluids) appears on 2,899 US grants and 4,044 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,899
- Published applications
- 4,044
- Assignees
- 1,786
- Inventors
- 8,010
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 19 | 0 |
| 1979 | 9 | 0 |
| 1980 | 16 | 0 |
| 1981 | 22 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 15 | 0 |
| 1985 | 18 | 0 |
| 1986 | 23 | 0 |
| 1987 | 19 | 0 |
| 1988 | 25 | 0 |
| 1989 | 28 | 0 |
| 1990 | 25 | 0 |
| 1991 | 21 | 0 |
| 1992 | 26 | 0 |
| 1993 | 50 | 0 |
| 1994 | 47 | 0 |
| 1995 | 49 | 0 |
| 1996 | 32 | 0 |
| 1997 | 58 | 0 |
| 1998 | 59 | 0 |
| 1999 | 58 | 0 |
| 2000 | 41 | 0 |
| 2001 | 30 | 14 |
| 2002 | 32 | 33 |
| 2003 | 25 | 41 |
| 2004 | 29 | 66 |
| 2005 | 22 | 48 |
| 2006 | 32 | 87 |
| 2007 | 27 | 95 |
| 2008 | 30 | 98 |
| 2009 | 45 | 106 |
| 2010 | 44 | 136 |
| 2011 | 78 | 148 |
| 2012 | 88 | 136 |
| 2013 | 77 | 133 |
| 2014 | 79 | 133 |
| 2015 | 81 | 146 |
| 2016 | 83 | 157 |
| 2017 | 74 | 165 |
| 2018 | 78 | 188 |
| 2019 | 146 | 227 |
| 2020 | 143 | 252 |
| 2021 | 156 | 349 |
| 2022 | 139 | 367 |
| 2023 | 157 | 346 |
| 2024 | 189 | 240 |
| 2025 | 195 | 202 |
| 2026 | 128 | 131 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2239/06Filter clothIndexing code1,771
- B01D 2239/04Additives and treatments of the filtering materialIndexing code1,629
- B01D 2239/12Special parameters characterising the filtering materialIndexing code1,434
- B01D 2239/02Types of fibres, filaments or particles, self-supporting or supported materialsIndexing code799
- B01D 2239/10Filtering material manufacturingIndexing code699
- B01D 2239/08Special characteristics of bindersIndexing code397
Recent patents
- Method for adjusting grouting parameters in preparation of ceramic composite fiber-based catalytic filter tube, and method and device for preparing ceramic composite fiber-based catalytic filter tube6 Oct 2026US 12,752,223 B2Zhejiang Zhiyuan Environmental Technology Co., Ltd
- Substrate treatments29 Sep 2026US 12,746,490 B2Donaldson Company, Inc.
- Granulated hierarchical material structure29 Sep 2026US 12,746,527 B2Metalmark Innovations, PBC
- High-performance fabric for water/diesel separating filters22 Sep 2026US 12,741,236 B2Saati S.P.A.
- System and method for ice bath filtering22 Sep 2026US 12,741,241 B2Lowtemp Industries LLC
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Method of filtration of particulated systems with injection of nanobubbles, and, use8 Oct 2026US 2026/0306978 A1Universidade Federal Do Rio Grande Do Sul—Ufrgs
- Filter material, method for producing the filter material, and use of melt-blown polypropylene fibers8 Oct 2026US 2026/0306979 A1Carl Freudenberg KG
- System and method for deaeration1 Oct 2026US 2026/0295469 A1Donaldson Company, Inc.
- Method for preparing a composite filter medium and the composite filter medium obtained with this method1 Oct 2026US 2026/0295484 A1Saati S.P.A.
Most cited
By later US patents
- Melt-blown fibrous web1,019US 5,582,907 APall Corporation · 1996
- Blood filter and method of filtration941US 5,190,657 ALydall, Inc. · 1993
- Web of blended microfibers and crimped bulking fibers445US 4,118,531 AMinnesota Mining and Manufacturing Company · 1978
- Melt-blown fibrous electrets387US 4,215,682 AMinnesota Mining and Manufacturing Company · 1980
- Deformable well screen320US 5,901,789 AShell Oil Company · 1999