H01M 8/222
Fuel cells in which the fuel is based on compounds containing nitrogen
Official title: {Fuel cells in which the fuel is based on compounds containing nitrogen, e.g. hydrazine, ammonia}
H01M8/222 (Fuel cells in which the fuel is based on compounds containing nitrogen) appears on 125 US grants and 172 published applications in this corpus.
Search patents in H01M- Granted patents
- 125
- Published applications
- 172
- Assignees
- 125
- Inventors
- 380
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 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 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 2 | 5 |
| 2004 | 1 | 3 |
| 2005 | 4 | 5 |
| 2006 | 3 | 0 |
| 2007 | 2 | 2 |
| 2008 | 1 | 10 |
| 2009 | 2 | 5 |
| 2010 | 4 | 14 |
| 2011 | 3 | 6 |
| 2012 | 7 | 11 |
| 2013 | 8 | 8 |
| 2014 | 4 | 7 |
| 2015 | 7 | 10 |
| 2016 | 6 | 10 |
| 2017 | 8 | 6 |
| 2018 | 7 | 2 |
| 2019 | 6 | 11 |
| 2020 | 6 | 8 |
| 2021 | 9 | 8 |
| 2022 | 5 | 6 |
| 2023 | 8 | 6 |
| 2024 | 6 | 15 |
| 2025 | 6 | 6 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel cell system and control method thereof28 Jul 2026US 12,695,107 B2Hyundai Motor Company
- Electrocatalytic method for hydrogen production12 May 2026US 12,624,466 B1King Fahd University of Petroleum and Minerals
- Method for operating an SOFC for the combined production of electricity and nitric oxide30 Dec 2025US 12,512,498 B2Yara International Asa
- Hydrogen release and storage system, hydrogen release and storage method, ammonia production apparatus, gas turbine, fuel cell, and steel mill23 Dec 2025US 12,503,362 B2Mitsubishi Heavy Industries, Ltd.
- Electrochemical amine/nitrile redox method for ambient hydrogen storage9 Sep 2025US 12,412,912 B2
- Anion Exchange Ionomer With A Poyarylene Backbone and Anion Exchange Membrane Incorporating Same30 Apr 2026US 2026/0117034 A1USA Fortescue IP, Inc.
- Ammonia supply system, hydrogen production system, carbon-free power generation system, and fuel cell system12 Mar 2026US 2026/0070782 A1SK Innovation Co., Ltd.
- Corrosion-resistant system, carbon-free power generation system, and fuel cell system12 Mar 2026US 2026/0074250 A1SK Innovation Co., Ltd.
- Artificial photosynthesis energy systems and methods15 Jan 2026US 2026/0018639 A1Shaheen Innovations Holding Limited
- Methods of manufacture of templates with irni nanobranches (nbs), irnicu@cu nanostructures and electrocatalysts comprising irnicu@cu nanostructures, and applications thereof8 Jan 2026US 2026/0009160 A1City University of Hong Kong
Most cited
By later US patents
- Liquid fuel-housing tank for fuel cell and fuel cell80US 6,506,513 B1Kabushiki Kaisha Toshiba · 2003
- Ammonia cracker for production of hydrogen62US 6,936,363 B2Apollo Energy Systems, Incorporated · 2005
- Fuel cell using organic, high-molecular weight electrolyte44US 4,537,840 AHitachi, Ltd. · 1985
- Electrochemical energy storage systems and methods featuring optimal membrane systems42US 9,865,893 B2Lockheed Martin Advanced Energy Storage, LLC · 2018
- Fuel cells and fuel cell systems containing non-aqueous electrolytes34US 6,667,128 B2IdaTech, LLC · 2003