B03D 1/1475
Flotation tanks having means for discharging the pulp
Official title: {Flotation tanks having means for discharging the pulp, e.g. as a bleed stream}
B03D1/1475 (Flotation tanks having means for discharging the pulp) appears on 207 US grants and 85 published applications in this corpus.
Search patents in B03D- Granted patents
- 207
- Published applications
- 85
- Assignees
- 159
- Inventors
- 347
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 12 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 3 |
| 2003 | 5 | 6 |
| 2004 | 2 | 7 |
| 2005 | 4 | 3 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 0 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 4 |
| 2011 | 0 | 7 |
| 2012 | 0 | 5 |
| 2013 | 4 | 5 |
| 2014 | 3 | 4 |
| 2015 | 7 | 8 |
| 2016 | 5 | 5 |
| 2017 | 3 | 2 |
| 2018 | 6 | 3 |
| 2019 | 2 | 1 |
| 2020 | 1 | 6 |
| 2021 | 3 | 4 |
| 2022 | 2 | 0 |
| 2023 | 1 | 2 |
| 2024 | 3 | 0 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for flotation separation in a magnetically controllable and steerable medium5 May 2026US 12,618,010 B2Cidra Corporate Services Inc.
- Headrace system13 Jan 2026US 12,522,518 B2Utsunomiya Kogyo Co., Ltd.
- System and method for saturation of a multicomponent medium with active microbubbles24 Sep 2024US 12,097,512 B2FineFlot Inc.
- Flotation line10 Sep 2024US 12,083,539 B2Metso Outotec Finland Oy
- Flotation device12 Mar 2024US 11,925,884 B2Valmet Technologies Oy
- Flotation unit and flotation method24 Apr 2025US 2025/0128272 A1Metso Finland Oy
- Headrace system6 Jul 2023US 2023/0212035 A1Utsunomiya Kogyo Co., Ltd.
- Method and system for flotation separation in a magnetically controllable and steerable medium9 Feb 2023US 2023/0041631 A1Cidra Corporate Services Inc.
- System and method for saturation of a multicomponent medium with active microbubbles16 Dec 2021US 2021/0387206 A1FineFlot Inc.
- Flotation line7 Oct 2021US 2021/0308695 A1Outotec (Finland) Oy
Most cited
By later US patents
- System and method for minimizing the negative enviromental impact of the oilsands industry76US 8,424,601 B2Ex-Tar Technologies · 2013
- Centrifugal flotation separator72US 4,094,783 A1978
- Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand68US 4,545,892 AAlberta Energy Company Ltd. · 1985
- Apparatus and process for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles57US 5,167,798 AVirginia Tech Intellectual Properties, Inc. · 1992
- Upflow gas eductor induced air floatation separator54US 4,564,457 AL'eau Claire Systems, Inc. · 1986