C22B 3/282
Aliphatic amines
Official title: {Aliphatic amines}
C22B3/282 (Aliphatic amines) appears on 90 US grants and 25 published applications in this corpus.
Search patents in C22B- Granted patents
- 90
- Published applications
- 25
- Assignees
- 71
- Inventors
- 213
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 10 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 2 |
| 2019 | 1 | 4 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 4 | 4 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 3 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods for separation and recovery of rare earth elements from aqueous solutions using diglycolamide derivatives30 Jun 2026US 12,668,857 B2Battelle Energy Alliance, LLC
- Separation of rare earth elements24 Mar 2026US 12,584,193 B2SHINE Technologies, LLC
- Diglycolamide derivatives for separation and recovery of rare earth elements from aqueous solutions26 Aug 2025US 12,398,444 B2UT-Battelle, LLC
- Methods for simultaneous leaching and extraction of precious metals14 Nov 2023US 11,814,698 B2Excir Works Corp.
- Vanadium extraction from disparate shale ores11 Jul 2023US 11,697,600 B2First Vanadium Corp.
- Separation of rare earth elements25 Jun 2026US 2026/0176719 A1SHINE Technologies, LLC
- Use of lipophilic derivatives of aminopolycarboxylic acids for the extraction of rare earths from an acidic aqueous solution14 May 2026US 2026/0132482 A1Centre National De La Recherche Scientifique
- Process for selectively capturing chemical elements from a polymetallic sample26 Feb 2026US 2026/0055006 A1Centre National De La Recherche Scientifique
- Separation of rare earth elements2 Oct 2025US 2025/0305091 A1SHINE Technologies, LLC
- Method for recovering lithium from waste lithium ion batteries3 Jul 2025US 2025/0219177 A1Asaka Riken Co., Ltd.
Most cited
By later US patents
- Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions34US 5,939,034 AHenkel Corporation · 1999
- Selective extraction and recovery of copper32US 4,272,492 A1981
- Recovery of metal values from spent catalysts30US 4,721,606 AUnion Oil Company of California · 1988
- Refining of noble group metals27US 3,979,207 AMatthey Rustenburg Refiners (Proprietary) Limited · 1976
- Process for recovering gallium25US 4,193,968 AThe Anaconda Company · 1980