H01M 8/04119
With simultaneous supply or evacuation of electrolyte
Official title: with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
H01M8/04119 (With simultaneous supply or evacuation of electrolyte) appears on 2,721 US grants and 3,781 published applications in this corpus.
Search patents in H01M- Granted patents
- 2,721
- Published applications
- 3,781
- Assignees
- 762
- Inventors
- 5,492
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 12 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 10 | 0 |
| 1995 | 10 | 0 |
| 1996 | 10 | 0 |
| 1997 | 11 | 0 |
| 1998 | 19 | 0 |
| 1999 | 25 | 0 |
| 2000 | 28 | 0 |
| 2001 | 48 | 36 |
| 2002 | 64 | 121 |
| 2003 | 79 | 150 |
| 2004 | 79 | 152 |
| 2005 | 79 | 197 |
| 2006 | 90 | 188 |
| 2007 | 64 | 211 |
| 2008 | 81 | 193 |
| 2009 | 93 | 216 |
| 2010 | 159 | 212 |
| 2011 | 135 | 156 |
| 2012 | 144 | 115 |
| 2013 | 110 | 94 |
| 2014 | 117 | 129 |
| 2015 | 102 | 137 |
| 2016 | 88 | 114 |
| 2017 | 102 | 108 |
| 2018 | 95 | 111 |
| 2019 | 108 | 111 |
| 2020 | 111 | 120 |
| 2021 | 108 | 119 |
| 2022 | 115 | 147 |
| 2023 | 126 | 164 |
| 2024 | 71 | 202 |
| 2025 | 85 | 155 |
| 2026 | 86 | 123 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hollow fiber membrane material for high-humidification hydrogen fuel cell humidifier and preparation method and application thereof6 Oct 2026US 12,753,530 B2University of Electronic Science and Technology of China
- Hybrid hydrogen fuel cell combustor power system6 Oct 2026US 12,755,989 B2Caterpillar Inc.
- Fuel cell system including ejector6 Oct 2026US 12,755,990 B2Versa Power Systems, Ltd.
- Fuel-cell exhaust system6 Oct 2026US 12,755,991 B2Purem GmbH
- Humidifier leak diagnosis system and method for a fuel cell system6 Oct 2026US 12,755,993 B2Hyundai Motor Company
- Hollow fiber membrane module8 Oct 2026US 2026/0307014 A1Nok Corporation
- Fuel cell system with improved humidifier8 Oct 2026US 2026/0312088 A1Plastic Omnium New Energies France
- Device for filtering ambient air8 Oct 2026US 2026/0312089 A1Cellcentric GmbH & Co. KG
- Fuel cell system and purging method for inerting a fuel cell system8 Oct 2026US 2026/0312091 A1
- Liquid separator device and method of use1 Oct 2026US 2026/0295485 A1Pall Corporation
Most cited
By later US patents
- Process and system for converting carbonaceous feedstocks into energy without greenhouse gas emissions283US 6,187,465 B12001
- Fuel cell gas management system240US 6,013,385 AEmprise Corporation · 2000
- Surface replica fuel cell for micro fuel cell electrical power pack208US 5,759,712 A1998
- Method and system for supplying hydrogen for use in fuel cells190US 6,348,278 B1Mobil Oil Corporation · 2002
- Electrochemical fuel cell system with a regulated vacuum ejector for recirculation of the fluid fuel stream173US 5,441,821 ABallard Power Systems Inc. · 1995