H01M 8/22
Fuel cells in which the fuel is based on materials comprising carbon
Official title: Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
H01M8/22 (Fuel cells in which the fuel is based on materials comprising carbon) appears on 627 US grants and 768 published applications in this corpus.
Search patents in H01M- Granted patents
- 627
- Published applications
- 768
- Assignees
- 437
- Inventors
- 1,636
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 7 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 15 | 6 |
| 2002 | 13 | 11 |
| 2003 | 11 | 26 |
| 2004 | 12 | 11 |
| 2005 | 8 | 12 |
| 2006 | 5 | 23 |
| 2007 | 6 | 16 |
| 2008 | 8 | 29 |
| 2009 | 5 | 18 |
| 2010 | 9 | 36 |
| 2011 | 8 | 34 |
| 2012 | 18 | 32 |
| 2013 | 15 | 36 |
| 2014 | 22 | 35 |
| 2015 | 40 | 48 |
| 2016 | 33 | 48 |
| 2017 | 31 | 32 |
| 2018 | 32 | 41 |
| 2019 | 25 | 49 |
| 2020 | 46 | 31 |
| 2021 | 32 | 36 |
| 2022 | 24 | 27 |
| 2023 | 38 | 44 |
| 2024 | 22 | 34 |
| 2025 | 31 | 34 |
| 2026 | 13 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Reactant-transport engineering for high-power direct liquid-fuel/oxidant fuel cells6 Oct 2026US 12,755,987 B2Washington University
- Hydrogen activation/ionization accelerating apparatus having fingerprint-type panel stack structure25 Aug 2026US 12,719,068 B2
- Systems and methods for harnessing thermal gradient energy18 Aug 2026US 12,712,192 B2
- Fuel cell system and control method thereof28 Jul 2026US 12,695,107 B2Hyundai Motor Company
- Hydrogen fuel cell power source with metal bipolar plates16 Jun 2026US 12,658,462 B1The Government of the United States of America, as represented by the Secretary of the Navy
- Ion exchange membranes8 Oct 2026US 2026/0312108 A1Khalifa University of Science and Technology
- Method for boosting a redox flow battery, a membrane device, a membrane stack, and a system to perform said method24 Sep 2026US 2026/0290869 A1Aquabattery B.V.
- Manifold and methods for distributing slurry-based electrodes in flow battery cells20 Aug 2026US 2026/0245928 A1
- Energy Efficient Reverse Osmosis Filtration16 Jul 2026US 2026/0199837 A1Dd Filter Solutions, Inc.
- Soec-sofc-hbr hybrid system for green ammonia production25 Jun 2026US 2026/0179989 A1Fci
Most cited
By later US patents
- Surface replica fuel cell for micro fuel cell electrical power pack208US 5,759,712 A1998
- Aqueous liquid feed organic fuel cell using solid polymer electrolyte membrane173US 5,599,638 ACalifornia Institute of Technology · 1997
- Fuel cells for powering well stimulation equipment168US 10,577,910 B2Halliburton Energy Services.Inc. · 2020
- Semi-solid electrodes having high rate capability132US 8,993,159 B224M Technologies, Inc. · 2015
- Direct methanol feed fuel cell and system113US 5,773,162 ACalifornia Institute of Technology · 1998