B03D 1/20
With internal air pumps
Official title: with internal air pumps
B03D1/20 (With internal air pumps) appears on 46 US grants and 29 published applications in this corpus.
Search patents in B03D- Granted patents
- 46
- Published applications
- 29
- Assignees
- 30
- Inventors
- 96
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 4 |
| 2011 | 1 | 0 |
| 2012 | 3 | 1 |
| 2013 | 2 | 6 |
| 2014 | 0 | 1 |
| 2015 | 2 | 3 |
| 2016 | 5 | 1 |
| 2017 | 0 | 0 |
| 2018 | 2 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 4 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotor of gas dispersion arrangement4 Aug 2026US 12,697,626 B2Metso Finland Oy
- Froth flotation unit4 Mar 2025US 12,240,001 B2Outotec (Finland) Oy
- Floatation separation apparatus29 Nov 2022US 11,512,009 B2Kurita Water Industries Ltd.
- Method for converting a naturally-aspirated flotation cell to a forced-gas flotation cell, and apparatus thereof30 Nov 2021US 11,185,872 B2FLSmidth A/S
- Valve12 Jan 2021US 10,888,876 B2Weir Minerals Australia Ltd.
- Rotor of gas dispersion arrangement8 Aug 2024US 2024/0261800 A1Metso Finland Oy
- Method for converting a naturally-aspirated flotation cell to a forced-gas flotation cell, and apparatus thereof24 Jun 2021US 2021/0187517 A1FLSmidth A/S
- Froth flotation unit9 Jul 2020US 2020/0215551 A1Outotec (Finland) Oy
- Froth collection launder11 Jun 2020US 2020/0179948 A1Outotec (Finland) Oy
- A valve28 May 2020US 2020/0164386 A1Weir Minerals Australia Ltd.
Most cited
By later US patents
- Method of separating carbonaceous components from particulate coal containing inorganic solids and apparatus therefor51US 4,998,624 ACanadian Patents and Development Limited · 1991
- Method and apparatus for froth flotation35US 6,793,079 B2University of Illinois · 2004
- Mixing apparatus30US 3,972,815 AUnited States Filter Corporation · 1976
- Flotation separation apparatus and method29US 4,425,232 ADorr-Oliver Incorporated · 1984
- Foam fractionator29US 5,562,821 ACommonwealth of Puerto Rico · 1996