B04C 3/00
Apparatus in which the axial direction of the vortex flow following a
Official title: Apparatus in which the axial direction of the vortex {flow following a screw-thread type line} remains unchanged {; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct (combined with other devices B04C9/00)}
B04C3/00 (Apparatus in which the axial direction of the vortex flow following a) appears on 688 US grants and 614 published applications in this corpus.
Search patents in B04C- Granted patents
- 688
- Published applications
- 614
- Assignees
- 446
- Inventors
- 1,287
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 9 | 0 |
| 1980 | 10 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 11 | 0 |
| 1992 | 13 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 5 |
| 2002 | 12 | 10 |
| 2003 | 18 | 12 |
| 2004 | 9 | 6 |
| 2005 | 6 | 17 |
| 2006 | 3 | 8 |
| 2007 | 7 | 9 |
| 2008 | 10 | 15 |
| 2009 | 11 | 17 |
| 2010 | 12 | 20 |
| 2011 | 17 | 15 |
| 2012 | 13 | 14 |
| 2013 | 16 | 28 |
| 2014 | 14 | 23 |
| 2015 | 24 | 44 |
| 2016 | 28 | 25 |
| 2017 | 32 | 27 |
| 2018 | 29 | 37 |
| 2019 | 27 | 55 |
| 2020 | 44 | 32 |
| 2021 | 35 | 31 |
| 2022 | 28 | 33 |
| 2023 | 24 | 36 |
| 2024 | 27 | 37 |
| 2025 | 27 | 30 |
| 2026 | 17 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B04C 3/06Construction of inlets or outlets to the vortex chamber453
- B04C 2003/006Construction of elements by which the vortex flow is generated or degeneratedIndexing code216
- B04C 3/04Multiple arrangement thereof165
- B04C 2003/003Shapes or dimensions of vortex chambersIndexing code51
- B04C 3/02Apparatus in which the axial direction of the vortex flow following a26
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Most cited
By later US patents
- Down flow centrifugal separator210US 4,187,088 AMaloney-Crawford Corporation · 1980
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- System for removing contaminant particles from a gas142US 4,537,608 APall Corporation · 1985
- Side outlet tube120US 4,162,906 ADonaldson Company, Inc. · 1979
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