B01D 2239/12
Special parameters characterising the filtering material
B01D2239/12 (Special parameters characterising the filtering material) appears on 1,434 US grants and 1,988 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,434
- Published applications
- 1,988
- Assignees
- 979
- Inventors
- 4,261
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 10 | 0 |
| 1987 | 12 | 0 |
| 1988 | 12 | 0 |
| 1989 | 14 | 0 |
| 1990 | 12 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 29 | 0 |
| 1994 | 26 | 0 |
| 1995 | 24 | 0 |
| 1996 | 17 | 0 |
| 1997 | 38 | 0 |
| 1998 | 38 | 0 |
| 1999 | 29 | 0 |
| 2000 | 29 | 0 |
| 2001 | 21 | 4 |
| 2002 | 20 | 19 |
| 2003 | 11 | 16 |
| 2004 | 18 | 36 |
| 2005 | 8 | 13 |
| 2006 | 15 | 23 |
| 2007 | 12 | 29 |
| 2008 | 14 | 22 |
| 2009 | 12 | 26 |
| 2010 | 17 | 33 |
| 2011 | 17 | 54 |
| 2012 | 25 | 61 |
| 2013 | 27 | 55 |
| 2014 | 30 | 51 |
| 2015 | 35 | 49 |
| 2016 | 26 | 77 |
| 2017 | 34 | 79 |
| 2018 | 35 | 98 |
| 2019 | 82 | 112 |
| 2020 | 71 | 138 |
| 2021 | 79 | 199 |
| 2022 | 75 | 216 |
| 2023 | 80 | 220 |
| 2024 | 107 | 147 |
| 2025 | 108 | 124 |
| 2026 | 86 | 87 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2239/1233Fibre diameterIndexing code671
- B01D 2239/1291Other parametersIndexing code507
- B01D 2239/1216Pore sizeIndexing code500
- B01D 2239/1241Particle diameterIndexing code239
- B01D 2239/1208PorosityIndexing code225
- B01D 2239/1258PermeabilityIndexing code210
- B01D 2239/1225Fibre lengthIndexing code161
- B01D 2239/125Size distributionIndexing code64
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.
- 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
- Polyethersulfone fiber webs22 Sep 2026US 12,741,243 B2Hollingsworth & Vose Company
- 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
- Deformable well screen320US 5,901,789 AShell Oil Company · 1999
- Bicomponent fibers and webs made therefrom302US 4,795,668 AMinnesota Mining and Manufacturing Company · 1989