B01F 23/232311
The conduits being vertical draft pipes with a lower intake end and
Official title: {the conduits being vertical draft pipes with a lower intake end and an upper exit end}
B01F23/232311 (The conduits being vertical draft pipes with a lower intake end and) appears on 104 US grants and 57 published applications in this corpus.
Search patents in B01F- Granted patents
- 104
- Published applications
- 57
- Assignees
- 58
- Inventors
- 172
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 3 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 3 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 4 | 2 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 3 | 1 |
| 2015 | 0 | 11 |
| 2016 | 1 | 2 |
| 2017 | 6 | 1 |
| 2018 | 3 | 4 |
| 2019 | 4 | 1 |
| 2020 | 3 | 4 |
| 2021 | 4 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 4 |
| 2024 | 1 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- High-efficiency airlift pump28 Dec 2023US 2023/0416125 A1GIS Gas Infusion Systems Inc.
- Air-lifting venturi apparatus11 May 2023US 2023/0144114 A1Aqua Development Ltd.
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Most cited
By later US patents
- Water aeration apparatus72US 4,702,830 AKaiyo Kogyo Kabushiki Kaisha · 1987
- Pluri-tubular aerator70US 4,911,838 AKabushiki Kobe Seiko Sho · 1990
- Apparatus for diffusion in bodies of liquid48US 4,070,423 A1978
- Liquid aerator48US 4,215,081 A1980
- Fluid circulating device45US 4,169,873 AAero-Hydraulics Corporation · 1979