H01M 8/04432
Pressure differences
Official title: {Pressure differences, e.g. between anode and cathode}
H01M8/04432 (Pressure differences) appears on 121 US grants and 189 published applications in this corpus.
Search patents in H01M- Granted patents
- 121
- Published applications
- 189
- Assignees
- 72
- Inventors
- 386
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2004 | 0 | 3 |
| 2005 | 0 | 7 |
| 2006 | 1 | 7 |
| 2007 | 1 | 9 |
| 2008 | 2 | 10 |
| 2009 | 6 | 8 |
| 2010 | 3 | 9 |
| 2011 | 6 | 6 |
| 2012 | 9 | 6 |
| 2013 | 6 | 4 |
| 2014 | 8 | 4 |
| 2015 | 4 | 6 |
| 2016 | 4 | 5 |
| 2017 | 5 | 4 |
| 2018 | 3 | 9 |
| 2019 | 3 | 13 |
| 2020 | 12 | 12 |
| 2021 | 10 | 14 |
| 2022 | 13 | 10 |
| 2023 | 13 | 10 |
| 2024 | 3 | 11 |
| 2025 | 7 | 13 |
| 2026 | 2 | 9 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Purge systems and methods in a fuel cell system28 Apr 2026US 12,614,742 B2Cummins Inc.
- Humidifier for fuel cell10 Feb 2026US 12,548,787 B2Hyundai Motor Company
- Fuel cell system and method of controlling same23 Dec 2025US 12,506,164 B2Hyundai Motor Company
- Systems and methods to measure or control fuel cell stack excess hydrogen flow using ejector mixing state16 Dec 2025US 12,500,253 B2Cummins Inc.
- Method for checking at least one sensor within the anode path of a fuel cell system25 Nov 2025US 12,482,838 B2Robert Bosch GmbH
- Ai driven vfd control for securing membrane in flow batteries8 Oct 2026US 2026/0312097 A1ViZn Energy Systems, Inc.
- Swelling reduction system1 Oct 2026US 2026/0302291 A1Subaru Corporation
- Apparatus for Controlling Valve of Fuel Cell System, Method Thereof and Vehicle Including Same1 Oct 2026US 2026/0302296 A1Hyundai Motor Company
- Inspection method for controlling the opening duration of an outlet valve of a liquid container in an anode exhaust section of a fuel cell system20 Aug 2026US 2026/0245931 A1AVL List GmbH
- Method for operating an air system, and control unit13 Aug 2026US 2026/0237699 A1Robert Bosch GmbH
Most cited
By later US patents
- Combined power generation system and unit, method, and program for controlling the same34US 9,666,888 B2Mitsubishi Hitachi Power Systems, Ltd. · 2017
- Fuel cell apparatus and methods19US 8,273,485 B2Lilliputian Systems, Inc. · 2012
- Fuel cell system containing humidity sensor and method of operating thereof13US 10,581,090 B2Bloom Energy Corporation · 2020
- Method for leak detection in gas feeding systems with redundant valves11US 7,127,937 B1GM Global Technology Operations LLC · 2006
- Method and system for controlling fluid delivery in a fuel cell6US 7,205,060 B2UltraCell Corporation · 2007