B01D 2201/287
Filtering elements with a vertical or inclined rotation or symmetry axis
B01D2201/287 (Filtering elements with a vertical or inclined rotation or symmetry axis) appears on 260 US grants and 65 published applications in this corpus.
Search patents in B01D- Granted patents
- 260
- Published applications
- 65
- Assignees
- 163
- Inventors
- 426
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 11 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 12 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 10 | 0 |
| 1990 | 9 | 0 |
| 1991 | 4 | 0 |
| 1992 | 12 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 16 | 0 |
| 1996 | 12 | 0 |
| 1997 | 8 | 0 |
| 1998 | 2 | 0 |
| 1999 | 9 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 3 |
| 2005 | 4 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 4 |
| 2018 | 3 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 10 |
| 2021 | 1 | 4 |
| 2022 | 13 | 12 |
| 2023 | 3 | 4 |
| 2024 | 3 | 7 |
| 2025 | 5 | 6 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Method and apparatus for testing the integrity of filter elements142US 5,417,101 APall Corporation · 1995
- Pressure filter with vibratory impactor125US 4,526,688 AIndustrial Filter & Pump Mfg. Co. · 1985
- Fuel filter and water separator apparatus88US 4,298,465 ARacor Industries, Inc. · 1981
- Filtration method and apparatus86US 4,790,942 AMembrex, Inc. · 1988
- Small volume rotary filter86US 4,876,013 AMembrex, Inc. · 1989