H01M 8/04291
Arrangements for managing water in solid electrolyte fuel cell systems
Official title: Arrangements for managing water in solid electrolyte fuel cell systems (H01M8/04119 takes precedence)
H01M8/04291 (Arrangements for managing water in solid electrolyte fuel cell systems) appears on 801 US grants and 1,011 published applications in this corpus.
Search patents in H01M- Granted patents
- 801
- Published applications
- 1,011
- Assignees
- 333
- Inventors
- 2,039
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 13 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 13 | 0 |
| 2000 | 13 | 0 |
| 2001 | 14 | 8 |
| 2002 | 21 | 33 |
| 2003 | 19 | 45 |
| 2004 | 22 | 56 |
| 2005 | 23 | 61 |
| 2006 | 30 | 48 |
| 2007 | 22 | 79 |
| 2008 | 22 | 57 |
| 2009 | 22 | 54 |
| 2010 | 50 | 62 |
| 2011 | 51 | 39 |
| 2012 | 49 | 31 |
| 2013 | 25 | 33 |
| 2014 | 27 | 27 |
| 2015 | 23 | 49 |
| 2016 | 21 | 34 |
| 2017 | 34 | 32 |
| 2018 | 32 | 37 |
| 2019 | 36 | 44 |
| 2020 | 38 | 34 |
| 2021 | 29 | 28 |
| 2022 | 27 | 31 |
| 2023 | 32 | 44 |
| 2024 | 16 | 18 |
| 2025 | 20 | 14 |
| 2026 | 12 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel-cell exhaust system6 Oct 2026US 12,755,991 B2Purem GmbH
- Gas conveying unit, system consisting of a gas conveying unit and a water separating device, and fuel cell system15 Sep 2026US 12,738,513 B2Robert Bosch GmbH
- Fuel-cell exhaust arrangement18 Aug 2026US 12,712,190 B2Purem GmbH
- Oxygen electrode catalytic layer for reversible, alkaline or anion exchange membrane electrochemical devices14 Jul 2026US 12,683,176 B2Hydrolite Ltd
- Fuel cell vehicle2 Jun 2026US 12,646,731 B2Hyundai Motor Company
- Manifold structure in fuel cell24 Sep 2026US 2026/0290871 A1Honda Motor Co., Ltd.
- Fuel cell system and control method thereof17 Sep 2026US 2026/0279858 A1Honda Motor Co., Ltd.
- Fuel cell exhaust fluid drain reduction9 Jul 2026US 2026/0196536 A1Volvo Truck Corporation
- Flow fields for enhancing fluid transport in electrochemical cells25 Jun 2026US 2026/0176777 A1Electric Hydrogen Co.
- 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
- Electrochemical production of ozone and hydrogen peroxide465US 5,972,196 ALynntech, Inc. · 1999
- Surface replica fuel cell for micro fuel cell electrical power pack208US 5,759,712 A1998
- Power supply apparatus with fuel cell and method of controlling the same162US 7,883,808 B2Hitachi, Ltd. · 2011
- Fuel cell system utilizing ion exchange membranes and bipolar plates150US 4,175,165 AEngelhard Minerals & Chemicals Corporation · 1979
- Membrane-electrode assemblies for electrochemical cells150US 5,272,017 AGeneral Motors Corporation · 1993