H01M 8/04231
Purging of the reactants
Official title: {Purging of the reactants}
H01M8/04231 (Purging of the reactants) appears on 690 US grants and 966 published applications in this corpus.
Search patents in H01M- Granted patents
- 690
- Published applications
- 966
- Assignees
- 232
- Inventors
- 1,501
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 5 |
| 2002 | 5 | 13 |
| 2003 | 14 | 29 |
| 2004 | 12 | 36 |
| 2005 | 23 | 55 |
| 2006 | 12 | 54 |
| 2007 | 17 | 68 |
| 2008 | 22 | 57 |
| 2009 | 28 | 57 |
| 2010 | 42 | 59 |
| 2011 | 46 | 35 |
| 2012 | 46 | 29 |
| 2013 | 46 | 28 |
| 2014 | 35 | 22 |
| 2015 | 25 | 30 |
| 2016 | 27 | 42 |
| 2017 | 24 | 40 |
| 2018 | 30 | 31 |
| 2019 | 40 | 28 |
| 2020 | 28 | 19 |
| 2021 | 24 | 31 |
| 2022 | 29 | 25 |
| 2023 | 36 | 47 |
| 2024 | 13 | 43 |
| 2025 | 22 | 46 |
| 2026 | 19 | 37 |
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
- Method and system for estimating flight time of a hydrogen fuel cell UAV29 Sep 2026US 12,746,825 B2Industrial Technology Research Institute
- System and method for controlling fuel cell29 Sep 2026US 12,749,692 B2Hyundai Motor Company
- Gas management apparatus, and method for conditioning anode gas of a fuel cell11 Aug 2026US 12,704,222 B2Hengst GmbH & Co. KG
- Fuel cell stack diagnostics using crowdsourcing for connected fuel cell vehicle4 Aug 2026US 12,700,601 B2Ford Global Technologies, LLC
- Fuel cell system and purging method for inerting a fuel cell system8 Oct 2026US 2026/0312091 A1
- Diagnosis method for determining a state of a fuel cell system8 Oct 2026US 2026/0312098 A1Robert Bosch GmbH
- Centralized hydrogen distribution system for electric vehicle and electric vehicle including same1 Oct 2026US 2026/0302292 A1American Honda Motor Co., Inc.
- Controlled dynamic airflow control in a fuel cell system24 Sep 2026US 2026/0290857 A1Intelligent Energy Limited
- Fuel cell control system24 Sep 2026US 2026/0290862 A1Honda Motor Co., Ltd.
Most cited
By later US patents
- Purge gas protected transportable pressurized fuel cell modules and their operation in a power plant195US 5,573,867 AWestinghouse Electric Corp. · 1996
- High temperature fuel cell power plant165US 7,097,925 B2QuestAir Technologies Inc. · 2006
- Solid polymer fuel cell systems incorporating water removal at the anode127US 5,366,818 ABallard Power Systems Inc. · 1994
- System and method for optimizing fuel cell purge cycles110US 6,242,120 B1IdaTech, LLC · 2001
- Fuel cell system88US 4,657,828 AFuji Electric Co., Ltd. · 1987