H01M 4/8642
Gradient in composition
Official title: {Gradient in composition}
H01M4/8642 (Gradient in composition) appears on 138 US grants and 224 published applications in this corpus.
Search patents in H01M- Granted patents
- 138
- Published applications
- 224
- Assignees
- 112
- Inventors
- 531
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 2 |
| 2003 | 0 | 5 |
| 2004 | 2 | 3 |
| 2005 | 1 | 13 |
| 2006 | 4 | 8 |
| 2007 | 2 | 15 |
| 2008 | 2 | 14 |
| 2009 | 8 | 19 |
| 2010 | 8 | 22 |
| 2011 | 5 | 14 |
| 2012 | 9 | 11 |
| 2013 | 7 | 3 |
| 2014 | 5 | 13 |
| 2015 | 7 | 7 |
| 2016 | 7 | 7 |
| 2017 | 8 | 5 |
| 2018 | 6 | 13 |
| 2019 | 5 | 8 |
| 2020 | 10 | 10 |
| 2021 | 11 | 8 |
| 2022 | 6 | 5 |
| 2023 | 3 | 7 |
| 2024 | 6 | 3 |
| 2025 | 5 | 5 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- System and method for continuous fabrication of graded structured units using additive manufacturing17 Mar 2026US 12,580,215 B2Advanced Manufacturing LLC
- Cathode catalyst layer structure for membrane electrode of fuel cell and method for preparing same20 Jan 2026US 12,531,251 B2Robert Bosch GmbH
- Electrode for membrane-electrode assembly and method of manufacturing same30 Dec 2025US 12,512,481 B2Hyundai Motor Company
- Method for producing a catalyst-coated membrane24 Jun 2025US 12,341,200 B2Audi AG
- Methods and compositions for nanocomposites on electrode surfaces6 Aug 2026US 2026/0229551 A1West Virginia Board of Governors on Behalf of West Virginia University
- Fuel cell28 May 2026US 2026/0149005 A1Subaru Corporation
- Electrochemical cell, electrochemical cell device, module, and module housing device14 May 2026US 2026/0135119 A1KYOCERA Corporation
- Patterned catalyst layers in fuel cells4 Sep 2025US 2025/0279441 A1Robert Bosch GmbH
- Electrochemical cell, electrochemical cell device, module, and module housing device31 Jul 2025US 2025/0246691 A1KYOCERA Corporation
Most cited
By later US patents
- Energy devices and methods for the fabrication of energy devices84US 6,753,108 B1Superior MicroPowders LLC · 2004
- Active layer for membrane electrode assembly48US 5,882,810 AThe Dow ChemicalCompany · 1999
- Hybrid deposition of thin film solid oxide fuel cells and electrolyzers40US 5,753,385 AThe Regents of the University of California · 1998
- Electrode design37US 7,227,737 B2Maxwell Technologies, Inc. · 2007
- Hybrid deposition of thin film solid oxide fuel cells and electrolyzers32US 6,007,683 AThe Regents of the University of California · 1999