D21B 1/327
Using flotation devices
Official title: {using flotation devices}
D21B1/327 (Using flotation devices) appears on 73 US grants and 27 published applications in this corpus.
Search patents in D21B- Granted patents
- 73
- Published applications
- 27
- Assignees
- 40
- Inventors
- 138
- Latest grant
- 18 Apr 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 3 |
| 2002 | 3 | 0 |
| 2003 | 1 | 3 |
| 2004 | 0 | 3 |
| 2005 | 3 | 1 |
| 2006 | 0 | 2 |
| 2007 | 2 | 0 |
| 2008 | 1 | 2 |
| 2009 | 3 | 0 |
| 2010 | 0 | 4 |
| 2011 | 0 | 1 |
| 2012 | 3 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for treating aqueous feed by dissolved gas flotation18 Apr 2023US 11,629,459 B2Kemira Oyj
- Methods for deinking UV prints24 Jan 2023US 11,560,672 B2Nippon Paper Industries Co., Ltd.
- Froth flotation arrangement and a froth flotation method15 Jun 2021US 11,033,909 B2Outotec (Finland) Oy
- Method and device for cleaning fiber suspensions by means of flotation13 Oct 2020US 10,799,885 B2Rithco Papertec GmbH
- Flotation process and facility for the implementation thereof26 Nov 2019US 10,486,168 B2Kadant Lamort
- Methods for deinking uv prints28 Jan 2021US 2021/0025113 A1Nippon Paper Industries Co., Ltd.
- Method for treating aqueous feed by dissolved gas flotation24 Dec 2020US 2020/0399828 A1Kemira Oyj
- A froth flotation arrangement and a froth flotation method30 Apr 2020US 2020/0129992 A1Outotec (Finland) Oy
- Method and device for cleaning fiber suspensions by means of flotation10 Aug 2017US 2017/0225176 A1Rithco Papertec GmbH
- Flotation process and facility for the implementation thereof27 Oct 2016US 2016/0310965 A1Kadant Lamort
Most cited
By later US patents
- Froth flotation apparatus and method39US 4,399,028 AThe Black Clawson Company · 1983
- Method of and arrangement for the de-inking of pulp suspensions37US 4,331,534 AE & M Lamort · 1982
- Process and device for removing printer's ink from a fiber suspension36US 4,214,982 AJ. M. Voith GmbH · 1980
- Injector for a flotation device34US 5,437,784 AJ. M. Voith GmbH · 1995
- Aerating apparatus30US 4,721,562 AE et M Lamort · 1988