B01F 23/23421
The stirrers rotating about a vertical axis
Official title: {the stirrers rotating about a vertical axis}
B01F23/23421 (The stirrers rotating about a vertical axis) appears on 109 US grants and 60 published applications in this corpus.
Search patents in B01F- Granted patents
- 109
- Published applications
- 60
- Assignees
- 65
- Inventors
- 155
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 2 |
| 2002 | 6 | 1 |
| 2003 | 1 | 3 |
| 2004 | 4 | 10 |
| 2005 | 3 | 1 |
| 2006 | 3 | 0 |
| 2007 | 1 | 6 |
| 2008 | 1 | 5 |
| 2009 | 2 | 5 |
| 2010 | 7 | 2 |
| 2011 | 2 | 1 |
| 2012 | 3 | 1 |
| 2013 | 2 | 4 |
| 2014 | 0 | 2 |
| 2015 | 1 | 2 |
| 2016 | 2 | 2 |
| 2017 | 0 | 2 |
| 2018 | 3 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 2 |
| 2021 | 2 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for optimizing the energy consumption of an aerator in the field of water treatment23 Dec 2025US 12,503,381 B2L'Air Liquide Societe Anonyme Pour L'Etude Et L' Exploitation Des Procedes George Claude
- Cooling water stirrer and water purifier having the same29 Nov 2022US 11,511,218 B2LG Electronics Inc.
- Flow straightening vane for aerator7 Jun 2022US 11,352,276 B2Aqua-Aerobic Systems, Inc.
- Rotary compression mixer21 Sep 2021US 11,123,697 B2
- Systems and methods for formation of biologically active granules and biologically active granules12 Jan 2021US 10,889,515 B2Blue Frog Technologies LLC
- Bubble-fountain-type water circulation device3 Sep 2026US 2026/0257951 A1C&C Solution Co., Ltd
- Alcoholizer for receiving a fluid15 Feb 2024US 2024/0052280 A1Elite Power Global Trading Ltd.
- Flow straightening vane for aerator4 Nov 2021US 2021/0340040 A1Aqua-Aerobic Systems, Inc.
- Method for optimizing the energy consumption of an aerator in the field of water treatment14 Oct 2021US 2021/0317021 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Reactor for gas-liquid mass transfer22 Oct 2020US 2020/0332389 A1Outotec (Finland) Oy
Most cited
By later US patents
- Rotary surface aerator with adjustable liquid transporting units47US 4,465,645 A1984
- Mixing systems42US 5,972,661 AGeneral Signal Corporation · 1999
- Floating aerator having means to vary the length of the draft pipe38US 4,030,859 ALake Aid Inc. · 1977
- Mixer/aerator for waste water38US 5,021,154 A1991
- Apparatus for mixing gas and liquid31US 4,540,528 A1985