H01M 4/8807
Gas diffusion layers
Official title: {Gas diffusion layers}
H01M4/8807 (Gas diffusion layers) appears on 658 US grants and 1,003 published applications in this corpus.
Search patents in H01M- Granted patents
- 658
- Published applications
- 1,003
- Assignees
- 446
- Inventors
- 2,304
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 2 |
| 2002 | 13 | 28 |
| 2003 | 9 | 29 |
| 2004 | 11 | 34 |
| 2005 | 15 | 38 |
| 2006 | 19 | 36 |
| 2007 | 11 | 47 |
| 2008 | 10 | 42 |
| 2009 | 12 | 43 |
| 2010 | 29 | 48 |
| 2011 | 25 | 29 |
| 2012 | 22 | 24 |
| 2013 | 27 | 31 |
| 2014 | 18 | 31 |
| 2015 | 19 | 31 |
| 2016 | 23 | 43 |
| 2017 | 31 | 38 |
| 2018 | 32 | 49 |
| 2019 | 30 | 56 |
| 2020 | 41 | 49 |
| 2021 | 35 | 58 |
| 2022 | 48 | 53 |
| 2023 | 41 | 57 |
| 2024 | 37 | 43 |
| 2025 | 30 | 39 |
| 2026 | 17 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aqueous Zn||NO2 electrochemical cell6 Oct 2026US 12,756,037 B2City University of Hong Kong
- Method for the preparation of a gas diffusion layer and a gas diffusion layer obtained or obtainable by such method28 Jul 2026US 12,692,607 B2Avantium Knowledge Centre B.V.
- Oxygen electrode catalytic layer for reversible, alkaline or anion exchange membrane electrochemical devices14 Jul 2026US 12,683,176 B2Hydrolite Ltd
- Carbon fiber and graphene compounded high-strength porous material, and gas diffusion layer and preparation method therefor30 Jun 2026US 12,671,094 B2Anhui University
- Method for producing a green paper for producing a gas diffusion layer for a fuel cell23 Jun 2026US 12,665,202 B2Giesecke+Devrient Currency Technology GmbH
- Membrane electrode assembly with protected edges8 Oct 2026US 2026/0312106 A1GM Global Technology Operations LLC
- Rolled material, method, and device1 Oct 2026US 2026/0296820 A1Robert Bosch GmbH
- Polymer electrolyte membrane cells with carbon-ionomer microporous layers10 Sep 2026US 2026/0265930 A1GM Global Technology Operations LLC
- Method for manufacturing electrode, method for manufacturing membrane electrode assembly, and method for inspecting electrode10 Sep 2026US 2026/0269277 A1Honda Motor Co., Ltd.
- Catalyst composition and catalyst layer for polymer electrolyte fuel cell27 Aug 2026US 2026/0253911 A1Nissan Chemical Corporation
Most cited
By later US patents
- Aqueous liquid feed organic fuel cell using solid polymer electrolyte membrane173US 5,599,638 ACalifornia Institute of Technology · 1997
- Nanowire structures comprising carbon135US 7,842,432 B2Nanosys, Inc. · 2010
- Materials and processes for providing fuel cells and active membranes132US 6,403,245 B1MicroCoating Technologies, Inc. · 2002
- Direct methanol feed fuel cell and system113US 5,773,162 ACalifornia Institute of Technology · 1998
- Nanostructured catalyst supports112US 8,278,011 B2Nanosys, Inc. · 2012