B03D 2203/025
Precious metal ores
B03D2203/025 (Precious metal ores) appears on 101 US grants and 78 published applications in this corpus.
Search patents in B03D- Granted patents
- 101
- Published applications
- 78
- Assignees
- 71
- Inventors
- 255
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 3 |
| 2008 | 2 | 3 |
| 2009 | 1 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 1 |
| 2013 | 2 | 4 |
| 2014 | 2 | 3 |
| 2015 | 0 | 2 |
| 2016 | 7 | 5 |
| 2017 | 3 | 4 |
| 2018 | 3 | 3 |
| 2019 | 4 | 8 |
| 2020 | 7 | 7 |
| 2021 | 5 | 6 |
| 2022 | 1 | 7 |
| 2023 | 6 | 3 |
| 2024 | 2 | 7 |
| 2025 | 3 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compounds, methods, and systems for benefication of rare earth elements by flotation and gravity concentration10 Mar 2026US 12,569,861 B2Colorado School of Mines
- Application of selenium-containing organic compounds in copper sulfide flotation collectors4 Nov 2025US 12,458,984 B2Guangxi University
- MySx/ZSH mixture as sulfidizing agent22 Jul 2025US 12,364,990 B2Nouryon Chemicals International B. V.
- Iron chelators as activators in alkaline flotation circuits4 Mar 2025US 12,240,000 B2BASF SE
- Recovery of PGMs and chromite from mixed PGM/CR ores10 Dec 2024US 12,163,205 B2Anglo American Technical & Sustainability Services Ltd
- Apparatus and method for the recovery of fine heavy minerals4 Jun 2026US 2026/0151780 A1
- Mercaptide microemulsions collectors for mineral flotation30 Oct 2025US 2025/0332599 A1Arkema Inc.
- Materials and methods for increasing gold recovery from leachate solutions6 Feb 2025US 2025/0043387 A1Locus Solutions Ipco, LLC
- Recovering gold6 Feb 2025US 2025/0043389 A1
- Systems and methods for separation of rare earth elements using air flotation28 Nov 2024US 2024/0391799 A1Batelle Memorial Institute
Most cited
By later US patents
- Process for the extraction of platinum group metals62US 4,685,963 ATexasgulf Minerals and Metals, Inc. · 1987
- Alkanol amine grinding aids32US 5,131,600 AThe Dow Chemical Company · 1992
- Flotation of sulfide mineral species with oils22US 6,827,220 B1Versitech Limited · 2004
- Collector compositions for the froth flotation of mineral values19US 4,822,483 AThe Dow Chemical Company · 1989
- Method of using polymeric sulfide mineral depressants17US 4,888,106 AAmerican Cyanamid Company · 1989