C22B 15/0091
By cementation
Official title: {by cementation}
C22B15/0091 (By cementation) appears on 51 US grants and 26 published applications in this corpus.
Search patents in C22B- Granted patents
- 51
- Published applications
- 26
- Assignees
- 42
- Inventors
- 147
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 4 |
| 2011 | 2 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 3 |
| 2024 | 0 | 4 |
| 2025 | 0 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for removing elemental copper from ternary battery waste and application thereof14 Jul 2026US 12,683,208 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper31 Mar 2026US 12,590,352 B2GreenNovo Environmental Technology Co., Ltd
- Processes for producing granular copper7 Nov 2023US 11,806,789 B2Destiny Copper Inc.
- Method for enriching precious metals from printed circuit board incineration ash from molten pool by circulating chlorination20 Sep 2022US 11,447,845 B2Beijing University of Technology
- Method for preparing iron ore concentrates by recycling copper slag tailings5 Apr 2022US 11,293,076 B2Kunming University of Science and Technology
- Metal-dissolving apparatus, processes, and uses thereof24 Jul 2025US 2025/0236927 A1Hatch Ltd.
- A method for iron and copper removal from solution using metallic reagents9 Jan 2025US 2025/0011898 A1Umicore AG & Co. KG
- Method for selectively recovering valuable metal in waste lithium battery17 Oct 2024US 2024/0347803 A1Guangdong Brunp Recycling Technology Co., Ltd.
- Selective leaching10 Oct 2024US 2024/0336992 A1Umicore AG & Co. KG
- Extraction of metals from lithium-ion battery material27 Jun 2024US 2024/0213562 A1Metso Finland Oy
Most cited
By later US patents
- Method for removing soluble selenium from acidic waste water38US 3,933,635 AThe United States of America as represented by the Secretary of the Interior · 1976
- Recovering zinc from a material containing zinc and iron32US 4,124,462 AMX-Processer Reinhardt & Co. AB · 1978
- Precipitation of selenium from copper electrowinning solutions27US 4,026,797 AAmax Inc. · 1977
- Recovering metal values from geothermal brine27US 4,602,820 A1986
- Recovery of copper values from iron-containing ore materials as mined and smelted24US 4,152,142 AKennecott Copper Corporation · 1979