B01D 2201/4007
Use of cam or ramp systems
B01D2201/4007 (Use of cam or ramp systems) appears on 161 US grants and 219 published applications in this corpus.
Search patents in B01D- Granted patents
- 161
- Published applications
- 219
- Assignees
- 67
- Inventors
- 296
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 5 |
| 2012 | 1 | 6 |
| 2013 | 3 | 15 |
| 2014 | 6 | 10 |
| 2015 | 7 | 10 |
| 2016 | 12 | 16 |
| 2017 | 9 | 13 |
| 2018 | 18 | 14 |
| 2019 | 11 | 16 |
| 2020 | 12 | 20 |
| 2021 | 9 | 13 |
| 2022 | 19 | 26 |
| 2023 | 11 | 16 |
| 2024 | 13 | 15 |
| 2025 | 19 | 8 |
| 2026 | 5 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Air Purifier27 Aug 2026US 2026/0251347 A1Shenzhen Chenbei Technology Co., Ltd.
- Filter Apparatus and Filter Element6 Aug 2026US 2026/0225012 A1Hydac Filtertechnik GmbH
- Filter element and filter with positioning feature11 Jun 2026US 2026/0158425 A1Zhejiang Laien Filtration System Co., Ltd.
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Most cited
By later US patents
- Replacement filter cartridge67US 9,067,154 B13M Innovative Properties Company · 2015
- Filter64US 6,251,273 B1Filterwerk Mann & Hummel GmbH · 2001
- Liquid filter, especially an oil filter50US 6,706,181 B1Mahle Filtersysteme GmbH · 2004
- Electronic interface for water filter system44US 8,580,109 B2Whirlpool Corporation · 2013
- Water filter unit34US 8,591,736 B2Whirlpool Corporation · 2013