H01M 8/04228
During shut-down
Official title: during shut-down
H01M8/04228 (During shut-down) appears on 607 US grants and 825 published applications in this corpus.
Search patents in H01M- Granted patents
- 607
- Published applications
- 825
- Assignees
- 192
- Inventors
- 1,474
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 4 |
| 2002 | 10 | 23 |
| 2003 | 11 | 33 |
| 2004 | 17 | 38 |
| 2005 | 23 | 45 |
| 2006 | 14 | 39 |
| 2007 | 12 | 37 |
| 2008 | 20 | 39 |
| 2009 | 22 | 48 |
| 2010 | 35 | 58 |
| 2011 | 28 | 41 |
| 2012 | 33 | 37 |
| 2013 | 31 | 45 |
| 2014 | 35 | 27 |
| 2015 | 38 | 37 |
| 2016 | 30 | 28 |
| 2017 | 29 | 26 |
| 2018 | 26 | 26 |
| 2019 | 28 | 23 |
| 2020 | 27 | 23 |
| 2021 | 22 | 14 |
| 2022 | 23 | 22 |
| 2023 | 26 | 39 |
| 2024 | 11 | 25 |
| 2025 | 16 | 22 |
| 2026 | 9 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel cell system29 Sep 2026US 12,749,693 B2Toyota Jidosha Kabushiki Kaisha
- Fuel cell system and method for stopping power generation in fuel cell system15 Sep 2026US 12,738,515 B2Honda Motor Co., Ltd.
- Connected fuel cell vehicle predictive freeze wake scheduling18 Aug 2026US 12,712,189 B2Ford Global Technologies, LLC
- System and method for fuel cell operation mode selection during power demand events2 Jun 2026US 12,643,406 B2Ford Global Technologies, LLC
- Method for controlling fuel cell device21 Apr 2026US 12,609,336 B2Japan Aerospace Exploration Agency
- Managing a fuel cell system in a fuel cell vehicle8 Oct 2026US 2026/0312087 A1Volvo Truck Corporation
- Method for operating a fuel cell system, and control device8 Oct 2026US 2026/0312093 A1Robert Bosch GmbH
- Fuel cell system and control method thereof1 Oct 2026US 2026/0302294 A1Honda Motor Co., Ltd.
- Apparatus for Controlling Valve of Fuel Cell System, Method Thereof and Vehicle Including Same1 Oct 2026US 2026/0302296 A1Hyundai Motor Company
- Fuel cell system and method of operating the fuel cell system10 Sep 2026US 2026/0264573 A1Volvo Truck Corporation
Most cited
By later US patents
- Method and apparatus for monitoring fuel cell performance359US 5,170,124 AMinister of National Defence of Her Majesty's Canadian Government · 1992
- Reformer and fuel cell system using the same103US 5,616,430 AToyota Jidosha Kabushiki Kaisha · 1997
- Fuel cell generator and method of the same98US 5,712,052 AToyota Jidosha Kabushiki Kaisha · 1998
- Fuel cell system88US 4,657,828 AFuji Electric Co., Ltd. · 1987
- Fuel cell system with humidity determination87US 6,524,733 B1Toyota Jidosha Kabushiki Kaisha · 2003