B01D 2201/18
Filters characterised by the openings or pores
B01D2201/18 (Filters characterised by the openings or pores) appears on 555 US grants and 473 published applications in this corpus.
Search patents in B01D- Granted patents
- 555
- Published applications
- 473
- Assignees
- 378
- Inventors
- 1,182
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 17 | 0 |
| 1989 | 13 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 18 | 0 |
| 1996 | 12 | 0 |
| 1997 | 19 | 0 |
| 1998 | 22 | 0 |
| 1999 | 18 | 0 |
| 2000 | 12 | 0 |
| 2001 | 11 | 3 |
| 2002 | 9 | 21 |
| 2003 | 19 | 20 |
| 2004 | 7 | 28 |
| 2005 | 12 | 20 |
| 2006 | 11 | 18 |
| 2007 | 8 | 11 |
| 2008 | 6 | 11 |
| 2009 | 7 | 13 |
| 2010 | 6 | 13 |
| 2011 | 6 | 17 |
| 2012 | 18 | 11 |
| 2013 | 7 | 8 |
| 2014 | 10 | 11 |
| 2015 | 8 | 11 |
| 2016 | 8 | 9 |
| 2017 | 8 | 20 |
| 2018 | 10 | 28 |
| 2019 | 16 | 28 |
| 2020 | 21 | 29 |
| 2021 | 16 | 37 |
| 2022 | 21 | 24 |
| 2023 | 23 | 27 |
| 2024 | 24 | 25 |
| 2025 | 21 | 21 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recovery tank22 Sep 2026US 12,740,683 B2SharkNinja Operating LLC
- Flat filter media22 Sep 2026US 12,741,238 B2Bullfrog International, LC
- System and method for ice bath filtering22 Sep 2026US 12,741,241 B2Lowtemp Industries LLC
- Retrofitting and use of rectangular filters, assembly and method for filtration25 Aug 2026US 12,714,957 B2Filtration Technology Corporation
- Coalescing media4 Aug 2026US 12,697,570 B2Donaldson Company, Inc.
- Collapsible Funnel with Integrated Mesh Screen for Capturing Kidney Stones from Urine Flow8 Oct 2026US 2026/0306078 A1
- Potato protein extraction apparatus and method27 Aug 2026US 2026/0250314 A1Root Extracts Limited
- Variable crimped expanded metal filters, bi-directionally expanded metal filters, combinations thereof and expanding methods for manufacturing expanded sheet metal7 May 2026US 2026/0124560 A1ACS Industries, Inc.
- Sleeve for a filtering unit with backwashing30 Apr 2026US 2026/0115631 A1Alfa Laval Moatti
- Increased flow screen panel16 Apr 2026US 2026/0102720 A1
Most cited
By later US patents
- Filter material construction and method335US 5,672,399 ADonaldson Company, Inc. · 1997
- Filter material construction and method190US 6,171,684 B2Donaldson Company, Inc. · 2001
- Oil filter with inner and outer coaxial filter elements140US 5,342,511 ABaldwin Filters, Inc. · 1994
- Filter for subterranean wells109US 5,664,628 APall Corporation · 1997
- Variable volume filter or concentrator98US 4,793,932 AMemtec Limited · 1988