B01D 2201/127
With means for keeping the spacing between the pleats
Official title: with means for keeping the spacing between the pleats
B01D2201/127 (With means for keeping the spacing between the pleats) appears on 132 US grants and 147 published applications in this corpus.
Search patents in B01D- Granted patents
- 132
- Published applications
- 147
- Assignees
- 74
- Inventors
- 315
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 3 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 6 |
| 2005 | 6 | 4 |
| 2006 | 3 | 6 |
| 2007 | 3 | 1 |
| 2008 | 3 | 5 |
| 2009 | 1 | 7 |
| 2010 | 1 | 3 |
| 2011 | 3 | 3 |
| 2012 | 5 | 8 |
| 2013 | 3 | 7 |
| 2014 | 4 | 8 |
| 2015 | 8 | 10 |
| 2016 | 3 | 6 |
| 2017 | 4 | 6 |
| 2018 | 9 | 9 |
| 2019 | 4 | 5 |
| 2020 | 12 | 12 |
| 2021 | 4 | 8 |
| 2022 | 5 | 10 |
| 2023 | 7 | 4 |
| 2024 | 6 | 6 |
| 2025 | 6 | 3 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Swimming pool filter cartridge14 Apr 2026US 12,599,853 B1Hangzhou Buda Water Treatment Equipment Co., Ltd
- Spacer film with integrated lamination strip7 Apr 2026US 12,594,528 B2Entegris, Inc.
- Filter element configurations24 Feb 2026US 12,558,639 B2Donaldson Company, Inc.
- Variable height, offset, angled & bridged embossment16 Jul 2026US 2026/0199811 A1Baldwin Filters, Inc.
- Filtration system with additive5 Mar 2026US 2026/0061351 A1Cummins Filtration Inc.
- Enhanced fuel water separation using structural embossing5 Feb 2026US 2026/0034481 A1Parker-Hannifin Corporation
- Heat activated adhesive for filters that may contain multiple elements19 Jun 2025US 2025/0196033 A1Baldwin Filters, Inc.
- Spin-on filter with external threads and methods1 May 2025US 2025/0135383 A1Donaldson Company, Inc.
Most cited
By later US patents
- Replacement filter cartridge assembly253US 5,211,846 APleatco Electronic & Filter Corp. · 1993
- Filter media cartridge119US 5,601,717 ASiebec S.A. · 1997
- Filter with efficiently sealed end110US 6,902,598 B2Fleetguard, Inc. · 2005
- Collapsible auto expanding media filter74US 7,452,396 B2Honeywell International Inc. · 2008
- Air cleaner with replaceable filter element73US 4,243,397 ADonaldson Company, Inc. · 1981