B01D 2239/0654
Support layers
B01D2239/0654 (Support layers) appears on 542 US grants and 633 published applications in this corpus.
Search patents in B01D- Granted patents
- 542
- Published applications
- 633
- Assignees
- 326
- Inventors
- 1,425
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 12 | 0 |
| 1994 | 9 | 0 |
| 1995 | 15 | 0 |
| 1996 | 10 | 0 |
| 1997 | 19 | 0 |
| 1998 | 20 | 0 |
| 1999 | 17 | 0 |
| 2000 | 19 | 0 |
| 2001 | 11 | 3 |
| 2002 | 9 | 8 |
| 2003 | 3 | 9 |
| 2004 | 8 | 12 |
| 2005 | 6 | 5 |
| 2006 | 8 | 7 |
| 2007 | 6 | 15 |
| 2008 | 5 | 10 |
| 2009 | 4 | 8 |
| 2010 | 5 | 26 |
| 2011 | 9 | 16 |
| 2012 | 13 | 16 |
| 2013 | 14 | 23 |
| 2014 | 7 | 21 |
| 2015 | 18 | 27 |
| 2016 | 10 | 28 |
| 2017 | 11 | 14 |
| 2018 | 12 | 24 |
| 2019 | 21 | 31 |
| 2020 | 25 | 45 |
| 2021 | 20 | 44 |
| 2022 | 28 | 57 |
| 2023 | 22 | 78 |
| 2024 | 31 | 43 |
| 2025 | 33 | 29 |
| 2026 | 17 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polyethersulfone fiber webs22 Sep 2026US 12,741,243 B2Hollingsworth & Vose Company
- Anti-microbial filter18 Aug 2026US 12,708,690 B2Acell Industries Limited
- Biodegradable filters11 Aug 2026US 12,702,942 B2NxtNano, LLC
- Filter media comprising a polyethersulfone-based fine fiber layer4 Aug 2026US 12,697,569 B2Hollingsworth & Vose Company
- Sanitary mask sheet21 Jul 2026US 12,685,352 B2Kao Corporation
- Sanitary mask sheet17 Sep 2026US 2026/0272077 A1Kao Corporation
- Depth filter10 Sep 2026US 2026/0263976 A1Jnc Corporation
- Depth filter10 Sep 2026US 2026/0263977 A1Jnc Corporation
- Composite materials3 Sep 2026US 2026/0257159 A1DelStar Technologies, Inc.
- Filter medium, method of producing filter medium, and filter element13 Aug 2026US 2026/0233137 A1Mann+Hummel GmbH
Most cited
By later US patents
- Bicomponent fibers and webs made therefrom302US 4,795,668 AMinnesota Mining and Manufacturing Company · 1989
- Method of charging electret filter media289US 5,496,507 AMinnesota Mining and Manufacturing Company · 1996
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures252US 6,743,273 B2Donaldson Company, Inc. · 2004
- Method of making fibrous electrets241US 4,375,718 ASurgikos, Inc. · 1983
- Nanofiber filter media194US 6,872,311 B2Koslow Technologies Corporation · 2005