H01M 8/0444
Concentration
Official title: Concentration; Density (H01M8/04492 takes precedence)
H01M8/0444 (Concentration) appears on 634 US grants and 1,004 published applications in this corpus.
Search patents in H01M- Granted patents
- 634
- Published applications
- 1,004
- Assignees
- 310
- Inventors
- 1,902
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 3 |
| 2002 | 7 | 13 |
| 2003 | 9 | 18 |
| 2004 | 9 | 21 |
| 2005 | 7 | 32 |
| 2006 | 11 | 38 |
| 2007 | 14 | 60 |
| 2008 | 13 | 56 |
| 2009 | 16 | 61 |
| 2010 | 22 | 41 |
| 2011 | 35 | 34 |
| 2012 | 45 | 40 |
| 2013 | 32 | 37 |
| 2014 | 33 | 31 |
| 2015 | 28 | 31 |
| 2016 | 19 | 38 |
| 2017 | 23 | 38 |
| 2018 | 24 | 27 |
| 2019 | 39 | 40 |
| 2020 | 34 | 45 |
| 2021 | 29 | 35 |
| 2022 | 38 | 48 |
| 2023 | 48 | 60 |
| 2024 | 23 | 59 |
| 2025 | 42 | 48 |
| 2026 | 17 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric energy managing system and method thereof29 Sep 2026US 12,746,853 B2Industrial Technology Research Institute
- Method for operating a fuel cell system, and fuel cell system15 Sep 2026US 12,738,514 B2Robert Bosch GmbH
- Sensor for detecting at least one property of a fluid medium in at least one measuring chamber11 Aug 2026US 12,706,317 B2Robert Bosch GmbH
- Systems for converting and storing energy4 Aug 2026US 12,700,603 B2Standard Hydrogen Company, Inc.
- Fuel cell system and method for generating inert gas for a fuel cell system28 Jul 2026US 12,695,106 B2Airbus Operations GmbH
- Fuel cell system and purging method for inerting a fuel cell system8 Oct 2026US 2026/0312091 A1
- Detection method for detecting a state of a fuel cell system8 Oct 2026US 2026/0312095 A1
- Diagnosis method for determining a state of a fuel cell system8 Oct 2026US 2026/0312098 A1Robert Bosch GmbH
- Fuel cell control system24 Sep 2026US 2026/0290862 A1Honda Motor Co., Ltd.
- Combination of fuel cell and all solid state battery stack for a vehicle17 Sep 2026US 2026/0274091 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- PEM fuel cell monitoring system167US 5,763,113 AGeneral Motors Corporation · 1998
- Method and system for controlling output of fuel cell power generator135US 5,637,414 AFuji Electric Co., Ltd. · 1997
- Fuel cell generator and method of the same123US 5,677,073 AToyota Jidosha Kabushiki Kaisha · 1997
- Direct methanol feed fuel cell and system113US 5,773,162 ACalifornia Institute of Technology · 1998
- Fuel cell with proton conducting membrane97US 6,492,047 B1Ramot University Authority for Applied Research and Industrial Development Ltd. · 2002