C25C 1/20
Electrolytic production, recovery or refining of metals by electrolysis of solutions: of
Official title: of noble metals
C25C1/20 (Electrolytic production, recovery or refining of metals by electrolysis of solutions: of) appears on 211 US grants and 145 published applications in this corpus.
Search patents in C25C- Granted patents
- 211
- Published applications
- 145
- Assignees
- 163
- Inventors
- 558
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 2 |
| 2002 | 3 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 4 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 1 | 6 |
| 2012 | 2 | 4 |
| 2013 | 1 | 7 |
| 2014 | 1 | 7 |
| 2015 | 8 | 5 |
| 2016 | 3 | 11 |
| 2017 | 7 | 12 |
| 2018 | 7 | 11 |
| 2019 | 9 | 6 |
| 2020 | 5 | 8 |
| 2021 | 8 | 4 |
| 2022 | 5 | 10 |
| 2023 | 8 | 16 |
| 2024 | 1 | 8 |
| 2025 | 4 | 9 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for extracting palladium24 Mar 2026US 12,584,232 B2Institute of Process Engineering, Chinese Academy of Sciences
- Method for extracting and recovering gold from aqueous solution17 Mar 2026US 12,577,635 B2China University of Mining and Technology
- Electrowinning cell20 Jan 2026US 12,529,158 B2Greengold Engineering Pty Ltd
- Method for recovering metal from waste printed circuit board and a cell thereof21 Oct 2025US 12,448,695 B2City University of Hong Kong
- Silver ion sterilization solution preparation system16 Sep 2025US 12,416,091 B1Guangdong Kailian Electronic Technology Co., Ltd
- Method for leaching gold from a gold-bearing substrate6 Aug 2026US 2026/0226581 A1Universite Libre de Bruxelles
- Recovery of energy critical high value metals using functionalized materials23 Jul 2026US 2026/0209979 A1Cornell University
- System and process for electrowinning18 Jun 2026US 2026/0168121 A1Aurotect Inc
- System and process for electrowinning18 Jun 2026US 2026/0168122 A1Aurotect Inc
- Method of recovering valuable resource14 May 2026US 2026/0132485 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Inorganic perbromide compositions and methods of use thereof61US 5,607,619 AGreat Lakes Chemical Corporation · 1997
- Electrochemical process for recovering precious metals from their ores36US 4,128,462 A1978
- Method for recycling of obsolete printed circuit boards36US 9,215,813 B2Advanced Technology Materials, Inc. · 2015
- Electrolytic reactor for cleaning wastewater35US 4,445,990 AGeneral Electric Company · 1984
- Method for separating and isolating gold from copper in a gold processing system23US 5,961,833 AHW Process Technologies, Inc. · 1999