B01D 2239/0636
Two or more types of fibres present in the filter material
B01D2239/0636 (Two or more types of fibres present in the filter material) appears on 115 US grants and 197 published applications in this corpus.
Search patents in B01D- Granted patents
- 115
- Published applications
- 197
- Assignees
- 116
- Inventors
- 503
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 7 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 4 |
| 2005 | 2 | 3 |
| 2006 | 3 | 8 |
| 2007 | 2 | 3 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 8 |
| 2011 | 5 | 6 |
| 2012 | 2 | 6 |
| 2013 | 3 | 2 |
| 2014 | 2 | 4 |
| 2015 | 4 | 9 |
| 2016 | 4 | 4 |
| 2017 | 3 | 6 |
| 2018 | 0 | 10 |
| 2019 | 5 | 9 |
| 2020 | 5 | 9 |
| 2021 | 8 | 17 |
| 2022 | 6 | 23 |
| 2023 | 3 | 29 |
| 2024 | 13 | 18 |
| 2025 | 8 | 7 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High efficiency synthetic filter media1 Sep 2026US 12,722,107 B2Knowlton Technologies, LLC
- Tubular knitted geotextiles implementing non-biomass based inert threads, methods of making the same, and erosion sediment and pollution control products made from the same23 Jun 2026US 12,662,792 B2Mkb Company
- High temperature treated media9 Jun 2026US 12,649,982 B2Donaldson Company, Inc.
- Filter media, composites, and face mask systems using same26 May 2026US 12,636,524 B2Donaldson Company, Inc.
- Filter sheet media and method for manufacturing a filter sheet media31 Mar 2026US 12,589,342 B2Ahlstrom Oyj
- Filter Sheet Media and Method for Manufacturing a Filter Sheet Media9 Jul 2026US 2026/0192222 A1Ahlstrom Oyj
- Pulse filter7 May 2026US 2026/0124566 A1
- Filters with mechanical and electrostatic filtering capabilities2 Apr 2026US 2026/0091333 A1DelStar Technologies, Inc.
- Filter medium and method of producing a filter medium12 Feb 2026US 2026/0042042 A1
- Filter media comprising water-repellent additives and/or fibrillated fibers25 Sep 2025US 2025/0296021 A1Hollingsworth & Vose Company
Most cited
By later US patents
- Fibrous webs having enhanced electret properties174US 5,908,598 AMinnesota Mining and Manufacturing Company · 1999
- Pivoting joint infusion system with seal101US 7,083,597 B2Applied Diabetes Research, Inc. · 2006
- Electret filter media containing filtration enhancing additives100US 5,976,208 AMinnesota Mining and Manufacturing Company · 1999
- Fibrous webs useful for making electret filter media89US 5,968,635 AMinnesota Mining and Manufacturing Company · 1999
- Active particle-containing nonwoven material, method of formation thereof, and uses thereof88US 4,797,318 AKimberly-Clark Corporation · 1989