H01M 4/521
Of iron for aqueous cells
Official title: {of iron for aqueous cells}
H01M4/521 (Of iron for aqueous cells) appears on 37 US grants and 73 published applications in this corpus.
Search patents in H01M- Granted patents
- 37
- Published applications
- 73
- Assignees
- 43
- Inventors
- 179
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 4 |
| 2013 | 0 | 1 |
| 2014 | 1 | 5 |
| 2015 | 6 | 6 |
| 2016 | 1 | 2 |
| 2017 | 2 | 3 |
| 2018 | 3 | 3 |
| 2019 | 4 | 5 |
| 2020 | 2 | 6 |
| 2021 | 1 | 9 |
| 2022 | 4 | 5 |
| 2023 | 3 | 7 |
| 2024 | 0 | 2 |
| 2025 | 5 | 6 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Double layered hydroxide (DLH)-type compound and use thereof in an electrode for an energy storage device with its graphite and resin composite and electrolyte26 Aug 2025US 12,401,036 B2
- Decoupled electrode electrochemical energy storage system5 Aug 2025US 12,381,244 B2Form Energy, Inc.
- Space configurable battery structures for electrode assemblies incorporating ion exchange materials10 Jun 2025US 12,327,853 B2Zelos Energy Ltd.
- Rechargeable lithium ion battery for wide temperature range and high temperatures11 Mar 2025US 12,249,683 B2Customcells Holding GmbH
- Stack of electric batteries including series of fluidly connected unit cells25 Feb 2025US 12,237,548 B2Form Energy, Inc.
- Secondary battery and electrochemical device26 Feb 2026US 2026/0058139 A1Sunwoda Mobility Energy Technology Co., Ltd.
- Modified Current Collector for Secondary Battery13 Nov 2025US 2025/0349864 A1GRST International Limited
- Positive electrode active material and preparation method therefor, secondary battery, battery module, battery pack and electric device11 Sep 2025US 2025/0286047 A1Contemporary Amperex Technology (Hong Kong) Limited
- Space Configurable Battery Structures For Electrode Assemblies Incorporating Ion Exchange Materials4 Sep 2025US 2025/0279508 A1Zelos Energy Ltd.
- Electrochemical cell including an additive and method of operating the electrochemical cell3 Jul 2025US 2025/0219155 A1Form Energy, Inc.
Most cited
By later US patents
- Downhole power generation78US 6,253,847 B1Schlumberger Technology Corporation · 2001
- Chemoelectric battery23US 4,008,099 A1977
- Iron-based storage battery18US 6,033,343 AChemergy Ltd. · 2000
- Iron-air rechargeable battery17US 8,758,948 B2California Institute of Technology · 2014
- Electrolyte for iron-air batteries and iron-air battery15US 10,044,082 B2Toyota Jidosha Kabushiki Kaisha · 2018