H01M 4/881
Electrolytic membranes
Official title: {Electrolytic membranes}
H01M4/881 (Electrolytic membranes) appears on 499 US grants and 872 published applications in this corpus.
Search patents in H01M- Granted patents
- 499
- Published applications
- 872
- Assignees
- 317
- Inventors
- 1,849
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 5 |
| 2002 | 2 | 10 |
| 2003 | 4 | 35 |
| 2004 | 11 | 39 |
| 2005 | 15 | 48 |
| 2006 | 23 | 44 |
| 2007 | 12 | 46 |
| 2008 | 8 | 53 |
| 2009 | 22 | 50 |
| 2010 | 21 | 60 |
| 2011 | 19 | 36 |
| 2012 | 29 | 37 |
| 2013 | 34 | 24 |
| 2014 | 26 | 29 |
| 2015 | 13 | 19 |
| 2016 | 22 | 27 |
| 2017 | 19 | 27 |
| 2018 | 21 | 29 |
| 2019 | 19 | 28 |
| 2020 | 24 | 35 |
| 2021 | 30 | 33 |
| 2022 | 28 | 38 |
| 2023 | 21 | 32 |
| 2024 | 27 | 30 |
| 2025 | 29 | 30 |
| 2026 | 6 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ionomer for fuel cell capable of self-assembly and method of preparing the same1 Sep 2026US 12,725,820 B2Hyundai Motor Company
- Electrode ink deposition system for high-throughput polymer electrolyte fuel cell19 May 2026US 12,633,546 B2Uchicago Argonne, LLC
- Method for producing a functionalized structurized composition for a fuel cell and membrane electrode assembly19 May 2026US 12,633,547 B2Audi AG
- Hydrogen pumping proton exchange membrane electrochemical cell with carbon monoxide tolerant anode and method of making thereof14 Apr 2026US 12,603,315 B2Bloom Energy Corporation
- Hydrogen isotope concentrating apparatus27 Jan 2026US 12,533,634 B2Japan Atomic Energy Agency
- Method for manufacturing a catalyst layer, and such a layer, as well as a fuel cell module, assembly, power unit, and vehicle incorporating the same8 Oct 2026US 2026/0312079 A1
- A membrane electrode assembly and a method for the manufacture thereof8 Oct 2026US 2026/0312109 A1
- Rolled material, method, and device1 Oct 2026US 2026/0296820 A1Robert Bosch GmbH
- Catalyst layer for fuel cell10 Sep 2026US 2026/0269278 A1Toyota Jidosha Kabushiki Kaisha
- Patterned alkaline exchange membranes13 Aug 2026US 2026/0234309 A1Ecolectro, Inc
Most cited
By later US patents
- Membrane electrode assembly181US 5,879,828 AMinnesota Mining and Manufacturing Company · 1999
- Nanowire-based membrane electrode assemblies for fuel cells164US 7,179,561 B2Nanosys, Inc. · 2007
- Materials and processes for providing fuel cells and active membranes132US 6,403,245 B1MicroCoating Technologies, Inc. · 2002
- Nanowire-based membrane electrode assemblies for fuel cells109US 7,977,013 B2Nanosys, Inc. · 2011
- Nanowire-based membrane electrode assemblies for fuel cells107US 7,977,007 B2Nanosys, Inc. · 2011