B01D 39/1623
Of synthetic origin
Official title: {of synthetic origin}
B01D39/1623 (Of synthetic origin) appears on 1,923 US grants and 2,404 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,923
- Published applications
- 2,404
- Assignees
- 987
- Inventors
- 4,624
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 15 | 0 |
| 1979 | 13 | 0 |
| 1980 | 12 | 0 |
| 1981 | 8 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 15 | 0 |
| 1986 | 18 | 0 |
| 1987 | 19 | 0 |
| 1988 | 14 | 0 |
| 1989 | 20 | 0 |
| 1990 | 23 | 0 |
| 1991 | 11 | 0 |
| 1992 | 20 | 0 |
| 1993 | 31 | 0 |
| 1994 | 31 | 0 |
| 1995 | 42 | 0 |
| 1996 | 21 | 0 |
| 1997 | 49 | 0 |
| 1998 | 52 | 0 |
| 1999 | 50 | 0 |
| 2000 | 49 | 0 |
| 2001 | 47 | 15 |
| 2002 | 52 | 49 |
| 2003 | 41 | 73 |
| 2004 | 45 | 79 |
| 2005 | 44 | 67 |
| 2006 | 45 | 68 |
| 2007 | 25 | 63 |
| 2008 | 22 | 79 |
| 2009 | 24 | 69 |
| 2010 | 31 | 103 |
| 2011 | 59 | 80 |
| 2012 | 63 | 68 |
| 2013 | 49 | 73 |
| 2014 | 46 | 77 |
| 2015 | 44 | 85 |
| 2016 | 41 | 98 |
| 2017 | 44 | 88 |
| 2018 | 44 | 95 |
| 2019 | 93 | 103 |
| 2020 | 69 | 118 |
| 2021 | 73 | 181 |
| 2022 | 74 | 191 |
| 2023 | 54 | 190 |
| 2024 | 86 | 116 |
| 2025 | 97 | 100 |
| 2026 | 71 | 76 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Substrate treatments29 Sep 2026US 12,746,490 B2Donaldson Company, Inc.
- Polyethersulfone fiber webs22 Sep 2026US 12,741,243 B2Hollingsworth & Vose Company
- Flue gas filtration media8 Sep 2026US 12,728,374 B2Ahlstrom Oyj
- Two stage filter cartridge with an expandable frame facilitating replacement of the filter media1 Sep 2026US 12,722,105 B2Nanodocks Technology Limited
- High efficiency synthetic filter media1 Sep 2026US 12,722,107 B2Knowlton Technologies, LLC
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Filter material, method for producing the filter material, and use of melt-blown polypropylene fibers8 Oct 2026US 2026/0306979 A1Carl Freudenberg KG
- Sanitary mask sheet17 Sep 2026US 2026/0272077 A1Kao Corporation
- Methods of reducing the enzymatic hydrolysis activity rate in a composition obtained from a purification platform17 Sep 2026US 2026/0274889 A1Genentech, Inc.
- Depth filter10 Sep 2026US 2026/0263976 A1Jnc Corporation
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
- Air filtration arrangements having fluted media constructions and methods381US 6,673,136 B2Donaldson Company, Inc. · 2004