H01M 8/04649
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/04649 (Of fuel cell stacks) appears on 207 US grants and 276 published applications in this corpus.
Search patents in H01M- Granted patents
- 207
- Published applications
- 276
- Assignees
- 79
- Inventors
- 559
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 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 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 3 |
| 2004 | 1 | 4 |
| 2005 | 0 | 5 |
| 2006 | 2 | 7 |
| 2007 | 6 | 6 |
| 2008 | 4 | 12 |
| 2009 | 3 | 18 |
| 2010 | 5 | 31 |
| 2011 | 9 | 6 |
| 2012 | 15 | 8 |
| 2013 | 15 | 8 |
| 2014 | 5 | 13 |
| 2015 | 10 | 14 |
| 2016 | 16 | 17 |
| 2017 | 10 | 22 |
| 2018 | 14 | 9 |
| 2019 | 23 | 19 |
| 2020 | 10 | 9 |
| 2021 | 17 | 8 |
| 2022 | 8 | 17 |
| 2023 | 9 | 9 |
| 2024 | 7 | 7 |
| 2025 | 12 | 15 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling a drying process of a fuel cell system6 Oct 2026US 12,755,992 B2Robert Bosch GmbH
- Impedance monitoring of a modular electrolysis system25 Aug 2026US 12,716,141 B2Ohmium International, Inc.
- Voltage converter arrangement, fuel cell system and method of operating a voltage converter arrangement30 Dec 2025US 12,512,494 B2Audi AG
- Prediction method of electrochemical and mechanical performances in SOFC cold and hot cycle23 Sep 2025US 12,424,642 B1China University of Petroleum (East China)
- Impedance monitoring of a modular electrolysis system9 Sep 2025US 12,410,532 B2Ohmium International, Inc.
- Method for determining a regeneration measure in a fuel cell stack16 Jul 2026US 2026/0204604 A1Robert Bosch GmbH
- System and method for controlling air supply to fuel cell25 Jun 2026US 2026/0179984 A1Hyundai Motor Company
- Water trap apparatus for fuel cells and method of controlling the same18 Jun 2026US 2026/0171440 A1Hyundai Motor Company
- Fuel cell vehicle and a method of controlling the same11 Jun 2026US 2026/0158939 A1Hyundai Motor Company
- Testing system of selective dual mode type for fuel cell stacks or vapor/carbon dioxide co-electrolysis stacks11 Jun 2026US 2026/0163042 A1
Most cited
By later US patents
- Fuel cells incorporating nanotubes in fuel feed50US 6,589,682 B12003
- Structure and method for fuel cell system where multiple fuel cells and power electronics feed loads in parallel allowing for integrated electrochemical impedance spectroscopy (EIS)37US 9,461,320 B2Bloom Energy Corporation · 2016
- Generator system utilizing a fuel cell32US 4,839,246 AFuji Electric Co., Ltd. · 1989
- Polyelectrolytic fuel cell and the method of controlling the operation thereof24US 5,939,218 AToyota Jidosha Kabushiki Kaisha · 1999
- Electrochemical impedance spectroscopy (EIS) analyzer and method of using thereof14US 9,461,319 B2Bloom Energy Corporation · 2016