B03D 1/02
Froth-flotation processes
B03D1/02 (Froth-flotation processes) appears on 1,184 US grants and 738 published applications in this corpus.
Search patents in B03D- Granted patents
- 1,184
- Published applications
- 738
- Assignees
- 691
- Inventors
- 2,233
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 11 | 0 |
| 1978 | 6 | 0 |
| 1979 | 7 | 0 |
| 1980 | 22 | 0 |
| 1981 | 45 | 0 |
| 1982 | 28 | 0 |
| 1983 | 25 | 0 |
| 1984 | 33 | 0 |
| 1985 | 29 | 0 |
| 1986 | 30 | 0 |
| 1987 | 25 | 0 |
| 1988 | 28 | 0 |
| 1989 | 38 | 0 |
| 1990 | 24 | 0 |
| 1991 | 33 | 0 |
| 1992 | 32 | 0 |
| 1993 | 24 | 0 |
| 1994 | 27 | 0 |
| 1995 | 26 | 0 |
| 1996 | 31 | 0 |
| 1997 | 20 | 0 |
| 1998 | 22 | 0 |
| 1999 | 25 | 0 |
| 2000 | 24 | 0 |
| 2001 | 13 | 3 |
| 2002 | 16 | 7 |
| 2003 | 11 | 21 |
| 2004 | 19 | 24 |
| 2005 | 11 | 21 |
| 2006 | 11 | 15 |
| 2007 | 11 | 17 |
| 2008 | 6 | 22 |
| 2009 | 13 | 27 |
| 2010 | 13 | 30 |
| 2011 | 15 | 33 |
| 2012 | 21 | 27 |
| 2013 | 25 | 31 |
| 2014 | 25 | 46 |
| 2015 | 30 | 43 |
| 2016 | 32 | 31 |
| 2017 | 31 | 34 |
| 2018 | 31 | 43 |
| 2019 | 28 | 39 |
| 2020 | 33 | 35 |
| 2021 | 39 | 45 |
| 2022 | 28 | 45 |
| 2023 | 26 | 33 |
| 2024 | 29 | 22 |
| 2025 | 20 | 25 |
| 2026 | 15 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B03D 1/028Control and monitoring of flotation processes390
- B03D 1/021For treatment of phosphate ores118
- B03D 1/06Differential85
- B03D 1/023Carrier flotation48
- B03D 1/025Adapted for the flotation of fines34
- B03D 1/04By varying ambient atmospheric pressure30
- B03D 1/026Using an immiscible liquid in place of a gas for flotation9
Recent patents
- Method and apparatus for separating valuable minerals from ore22 Sep 2026US 12,741,286 B2Kaakkois-Suomen Ammattikorkeakoulu Oy
- Method for recycling iron ore tailing and use thereof25 Aug 2026US 12,716,113 B2Baotou Research Institute of Rare Earths
- Coarse particle flotation equipment and method based on coupled fluidization of cyclone and damping4 Aug 2026US 12,697,627 B2Central South University
- Ore dressing process for medium-grade and low-grade mixed collophanite19 May 2026US 12,629,697 B2Institute of Multipurpose Utilization of Mineral Resources, CAGS
- Method for lithium extraction by leaching from spodumene and desulfurization19 May 2026US 12,630,901 B1Institute of Process Engineering, Chinese Academy of Sciences
- Mining chemical collector compositions and processes for recovering metal from ore8 Oct 2026US 2026/0308119 A1Chevron Phillips Chemical Company LP
- Inflatable froth crowder apparatus for flotation machines27 Aug 2026US 2026/0249306 A1FLSmidth A/S
- A system for generating and using nox gases in an algae growth system13 Aug 2026US 2026/0233160 A1Paradigm Fuels Pty Ltd
- Method For Treating Phosphate Ores Containing Heavy Metals By Reverse Flotation13 Aug 2026US 2026/0234747 A1Ocp SA
- Process for the recovery of a useful material from a battery30 Jul 2026US 2026/0217534 A1Materials Processing Institute
Most cited
By later US patents
- Tar sands extraction process312US 5,985,138 AGeopetrol Equipment Ltd. · 1999
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Low temperature bitumen recovery process113US 4,946,597 AEsso Resources Canada Limited · 1990
- Method and apparatus for treatment of wastewater employing membrane bioreactors92US 6,805,806 B2Hydrotreat, Inc. · 2004
- Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution88US 5,379,902 AThe United States of America as represented by the United States Department of Energy · 1995