H01M 8/04302
Applied during start-up
Official title: applied during start-up
H01M8/04302 (Applied during start-up) appears on 745 US grants and 1,076 published applications in this corpus.
Search patents in H01M- Granted patents
- 745
- Published applications
- 1,076
- Assignees
- 256
- Inventors
- 1,883
- Latest grant
- 6 Oct 2026
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 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 6 |
| 2002 | 10 | 31 |
| 2003 | 10 | 38 |
| 2004 | 17 | 38 |
| 2005 | 20 | 46 |
| 2006 | 25 | 38 |
| 2007 | 16 | 28 |
| 2008 | 17 | 44 |
| 2009 | 15 | 42 |
| 2010 | 26 | 64 |
| 2011 | 27 | 39 |
| 2012 | 27 | 22 |
| 2013 | 31 | 36 |
| 2014 | 24 | 23 |
| 2015 | 32 | 33 |
| 2016 | 31 | 34 |
| 2017 | 32 | 49 |
| 2018 | 29 | 44 |
| 2019 | 42 | 49 |
| 2020 | 47 | 43 |
| 2021 | 34 | 55 |
| 2022 | 64 | 50 |
| 2023 | 48 | 75 |
| 2024 | 24 | 43 |
| 2025 | 43 | 62 |
| 2026 | 17 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hybrid hydrogen fuel cell combustor power system6 Oct 2026US 12,755,989 B2Caterpillar Inc.
- Hydrogen leak sensing device and method for fuel cell vehicle29 Sep 2026US 12,749,695 B2Hyundai Motor Company
- Fuel cell system4 Aug 2026US 12,700,605 B2LG Electronics Inc.
- System for protecting a fuel cell from cold temperatures21 Jul 2026US 12,689,046 B2Ford Global Technologies, LLC
- Fuel cell start control system and control method therefor16 Jun 2026US 12,658,458 B2Hyundai Motor Company
- Managing a fuel cell system in a fuel cell vehicle8 Oct 2026US 2026/0312087 A1Volvo Truck Corporation
- Conditioning method and conditioning device8 Oct 2026US 2026/0312092 A1Robert Bosch GmbH
- Solid polymer fuel battery activation method1 Oct 2026US 2026/0302286 A1Honda Motor Co., Ltd.
- Fuel cell system and control method thereof1 Oct 2026US 2026/0302294 A1Honda Motor Co., Ltd.
- Thermal management system for a fuel cell vehicle24 Sep 2026US 2026/0290863 A1AB Volvo Penta
Most cited
By later US patents
- Method and system for supplying hydrogen for use in fuel cells190US 6,348,278 B1Mobil Oil Corporation · 2002
- Method and apparatus for commencing operation of a fuel cell electric power generation system below the freezing temperature of water126US 5,798,186 ABallard Power Systems Inc. · 1998
- Hybrid electrical power system114US 5,968,680 AAlliedSignal Inc. · 1999
- Hydrogen production apparatus and method operable without supply of steam and suitable for fuel cell systems95US 6,103,411 ASanyo Electric Co., Lted. · 2000
- Power supply system, electric vehicle with power supply system mounted thereon, and method of regulating amount of fuel supply90US 5,964,309 AAisin Aw Co., Ltd. · 1999