C22B 3/32
Carboxylic acids
C22B3/32 (Carboxylic acids) appears on 161 US grants and 100 published applications in this corpus.
Search patents in C22B- Granted patents
- 161
- Published applications
- 100
- Assignees
- 142
- Inventors
- 452
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 3 |
| 2015 | 1 | 1 |
| 2016 | 4 | 2 |
| 2017 | 0 | 2 |
| 2018 | 2 | 4 |
| 2019 | 3 | 5 |
| 2020 | 3 | 2 |
| 2021 | 1 | 6 |
| 2022 | 3 | 11 |
| 2023 | 3 | 18 |
| 2024 | 4 | 11 |
| 2025 | 12 | 13 |
| 2026 | 6 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for separating nickel from lithium, and application thereof22 Sep 2026US 12,742,225 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Method for recovering hafnium and impurity metals from hafnium-containing waste residue14 Jul 2026US 12,680,145 B2Jiangxi Zhongha New Material Co., Ltd.
- Method for recycling nickel, cobalt and manganese from feed liquid containing nickel, cobalt and manganese28 Apr 2026US 12,612,681 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Method for recovering active metal of lithium secondary battery10 Feb 2026US 12,545,974 B2SK Innovation Co., Ltd.
- Method for producing mixed metal solution and method for producing mixed metal salt27 Jan 2026US 12,534,776 B2Jx Metals Circular Solutions Co., Ltd.
- Process for the extraction of manganese3 Sep 2026US 2026/0258526 A1Element 25 Limited
- Functionalized resins for lithium capture20 Aug 2026US 2026/0242891 A1Board of Regents, The University of Texas System
- Short-flow nickel-cobalt-manganese co-extraction process for laterite nickel ore hydrometallurgy20 Aug 2026US 2026/0242894 A1Gem Co., Ltd.
- Methods for extracting and recovering rare earths from aqueous solutions of organic acids23 Jul 2026US 2026/0209891 A1Centre National De La Recherche Scientifique
- Method for the optimisation of feed for downstream processing16 Jul 2026US 2026/0201502 A1iGo, Inc.
Most cited
By later US patents
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- Method for separating metal constituents from ocean floor nodules46US 4,042,664 ADeepsea Ventures, Inc. · 1977
- Insoluble chelating compositions46US 4,626,416 ADevoe-Holbein International, N.V. · 1986
- Removal of complexed heavy metals from waste effluents41US 4,332,687 APCA International, Inc. · 1982
- Process for removal of copper from solutions of chelating agent and copper41US 4,666,683 AEco-Tec Limited · 1987