B03D 1/021
For treatment of phosphate ores
Official title: {for treatment of phosphate ores}
B03D1/021 (For treatment of phosphate ores) appears on 118 US grants and 45 published applications in this corpus.
Search patents in B03D- Granted patents
- 118
- Published applications
- 45
- Assignees
- 72
- Inventors
- 224
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 12 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 3 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 2 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 3 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 4 |
| 2016 | 3 | 6 |
| 2017 | 2 | 1 |
| 2018 | 1 | 5 |
| 2019 | 3 | 2 |
| 2020 | 3 | 2 |
| 2021 | 5 | 3 |
| 2022 | 0 | 4 |
| 2023 | 3 | 2 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ore dressing process for medium-grade and low-grade mixed collophanite19 May 2026US 12,629,697 B2Institute of Multipurpose Utilization of Mineral Resources, CAGS
- Use of alkoxylated amines as collector agents for ore beneficiation16 May 2023US 11,648,569 B2Arkema France
- Flotation reagents from acidic olive oil2 May 2023US 11,638,923 B1King Saud University
- Flotation oils, processes and uses thereof17 Jan 2023US 11,554,378 B2
- Sulfonated modifiers for froth flotation30 Mar 2021US 10,961,382 B2Ecolab USA Inc.
- Method For Treating Phosphate Ores Containing Heavy Metals By Reverse Flotation13 Aug 2026US 2026/0234747 A1Ocp SA
- Compositions and methods for froth flotation of mineral ores13 Nov 2025US 2025/0345805 A1Ecolab USA Inc.
- Collector for the flotation of carbonates in phosphate rock10 Oct 2024US 2024/0335842 A1Kao Corporation
- Novel Cationic Collectors for Improving a Process for Froth Flotation of Silicates28 Sep 2023US 2023/0302464 A1Clariant International Ltd.
- Method For Flotation Of A Phosphate-Containing Ore2 Mar 2023US 2023/0066944 A1BASF SE
Most cited
By later US patents
- Process for the froth flotation of calcium phosphate-containing minerals and flotation agents therefor40US 4,358,368 ABerol Kemi AB · 1982
- Low molecular weight copolymers and terpolymers as depressants in mineral ore flotation28US 4,360,425 AAmerican Cyanamid Company · 1982
- Flotation beneficiation process for non-sulfide minerals25US 4,720,339 AAmerican Cyanamid Company · 1988
- Flotation of fine-grained materials20US 3,979,282 AEnglish Clays Lovering Pochin & Company Limited · 1976
- Process of phosphate ore beneficiation in the presence of residual organic polymeric flocculants20US 4,309,282 AAmerican Cyanamid Company · 1982