H01M 8/0254
Corrugated or undulated
Official title: corrugated or undulated
H01M8/0254 (Corrugated or undulated) appears on 554 US grants and 739 published applications in this corpus.
Search patents in H01M- Granted patents
- 554
- Published applications
- 739
- Assignees
- 262
- Inventors
- 1,423
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 4 |
| 2002 | 10 | 28 |
| 2003 | 16 | 21 |
| 2004 | 12 | 38 |
| 2005 | 21 | 40 |
| 2006 | 13 | 34 |
| 2007 | 17 | 28 |
| 2008 | 15 | 33 |
| 2009 | 17 | 27 |
| 2010 | 28 | 27 |
| 2011 | 22 | 21 |
| 2012 | 24 | 15 |
| 2013 | 15 | 11 |
| 2014 | 16 | 21 |
| 2015 | 14 | 27 |
| 2016 | 18 | 16 |
| 2017 | 21 | 37 |
| 2018 | 28 | 26 |
| 2019 | 24 | 42 |
| 2020 | 33 | 28 |
| 2021 | 27 | 32 |
| 2022 | 28 | 44 |
| 2023 | 23 | 34 |
| 2024 | 20 | 29 |
| 2025 | 24 | 40 |
| 2026 | 16 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel cell separator and method for manufacturing same6 Oct 2026US 12,755,986 B2Dongwoo Hst Co., Ltd.
- Fuel cell assembly29 Sep 2026US 12,749,691 B2Powercell Sweden AB
- Bipolar plate for a fuel cell system8 Sep 2026US 12,731,797 B2Robert Bosch GmbH
- Voltage measuring device for measuring the voltage of a plurality of electrochemical cells of an electrochemical reactor11 Aug 2026US 12,706,318 B2Alstom HydrogèNe SAS
- Fuel cell separator member and fuel cell stack12 May 2026US 12,626,932 B2Honda Motor Co., Ltd.
- Method for producing separator8 Oct 2026US 2026/0312084 A1Nok Corporation
- Separator for fuel cell and method of manufacturing separator for fuel cell1 Oct 2026US 2026/0302270 A1Toyota Jidosha Kabushiki Kaisha
- Fuel cell separator and method for manufacturing the same17 Sep 2026US 2026/0279847 A1Toyota Jidosha Kabushiki Kaisha
- Bipolar plates with optimized channel geometry3 Sep 2026US 2026/0260908 A1Hydrogenics Corporation
- Water electrolysis and fuel cell stacks with insert molding and methods of making the same20 Aug 2026US 2026/0242966 A1Bullx Research, LLC
Most cited
By later US patents
- Brazed bipolar plates for PEM fuel cells144US 5,776,624 AGeneral Motors Corporation · 1998
- Fully internal manifolded fuel cell stack110US 5,227,256 AInstitute of Gas Technology · 1993
- Arrangement of fuel cells based on a high-temperature solid electrolyte of stabilized zirconium oxide for achieving maximum possible power89US 5,034,288 AAsea Brown Boveri AG · 1991
- Planar fuel cell assembly82US 6,492,053 B1Ceramic Fuel Cells Limited · 2002
- Fluid flow plate for decreased density of fuel cell assembly77US 5,981,098 APlug Power Inc. · 1999