B04C 3/06
Construction of inlets or outlets to the vortex chamber
B04C3/06 (Construction of inlets or outlets to the vortex chamber) appears on 453 US grants and 442 published applications in this corpus.
Search patents in B04C- Granted patents
- 453
- Published applications
- 442
- Assignees
- 325
- Inventors
- 886
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 9 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 5 |
| 2003 | 12 | 9 |
| 2004 | 6 | 4 |
| 2005 | 3 | 10 |
| 2006 | 2 | 4 |
| 2007 | 6 | 5 |
| 2008 | 6 | 6 |
| 2009 | 5 | 15 |
| 2010 | 7 | 14 |
| 2011 | 12 | 11 |
| 2012 | 7 | 11 |
| 2013 | 13 | 19 |
| 2014 | 13 | 22 |
| 2015 | 18 | 30 |
| 2016 | 18 | 14 |
| 2017 | 17 | 21 |
| 2018 | 24 | 22 |
| 2019 | 17 | 46 |
| 2020 | 35 | 26 |
| 2021 | 27 | 21 |
| 2022 | 18 | 24 |
| 2023 | 20 | 31 |
| 2024 | 20 | 27 |
| 2025 | 21 | 25 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Cyclone separator204US 6,531,066 B1B.H.R. Group Limited · 2003
- Air cleaner apparatus70US 4,746,340 ADonaldson Company, Inc. · 1988
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- Multi-stage cyclone separator65US 4,289,611 AKlockner-Humboldt-Deutz Akt. · 1981