C25B 1/04
By electrolysis of water
Official title: by electrolysis of water
C25B1/04 (By electrolysis of water) appears on 2,742 US grants and 5,697 published applications in this corpus.
Search patents in C25B- Granted patents
- 2,742
- Published applications
- 5,697
- Assignees
- 1,752
- Inventors
- 9,185
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 7 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 10 | 0 |
| 1984 | 12 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 12 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 15 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 4 | 5 |
| 2002 | 10 | 16 |
| 2003 | 12 | 18 |
| 2004 | 9 | 35 |
| 2005 | 7 | 28 |
| 2006 | 12 | 40 |
| 2007 | 16 | 54 |
| 2008 | 19 | 64 |
| 2009 | 20 | 64 |
| 2010 | 12 | 102 |
| 2011 | 36 | 94 |
| 2012 | 47 | 102 |
| 2013 | 49 | 116 |
| 2014 | 59 | 140 |
| 2015 | 79 | 177 |
| 2016 | 94 | 203 |
| 2017 | 98 | 202 |
| 2018 | 126 | 212 |
| 2019 | 173 | 276 |
| 2020 | 148 | 270 |
| 2021 | 184 | 306 |
| 2022 | 214 | 436 |
| 2023 | 263 | 587 |
| 2024 | 279 | 787 |
| 2025 | 345 | 814 |
| 2026 | 225 | 549 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrogen production cathode and anode6 Oct 2026US 12,753,518 B2Civilized Power, LLC
- Electrochemical co-production of hydrogen and carbon monoxide6 Oct 2026US 12,753,519 B2Utility Global, Inc.
- Membrane electrode assembly for PEM water electrolysis capable of improving the electrical conductivity of the electrode layer and method of manufacturing thereof6 Oct 2026US 12,753,520 B2Korea Institute of Energy Research
- Power management system6 Oct 2026US 12,756,197 B2Techwin Co., Ltd.
- System and methods of water electrolysis29 Sep 2026US 12,747,509 B2Schlumberger Technology Corporation
- Oxygen reduction catalyst and use thereof8 Oct 2026US 2026/0307067 A1Toyota Jidosha Kabushiki Kaisha
- Polymerizable composition, ion exchange resin, ion exchange membrane, membrane electrode assembly, and hydrogen production device8 Oct 2026US 2026/0308295 A1Tokuyama Corporation
- Gas generator for a tool, usage of the gas generator and a tool with a gas generator8 Oct 2026US 2026/0308772 A1Hilti Aktiengesellschaft
- Scalable automated oxyhydrogen-production, storage, and utilization system8 Oct 2026US 2026/0308773 A1Enertopia Corp.
- Co2 and h2o co-electrolyser system8 Oct 2026US 2026/0308775 A1Ecole Polytechnique Federale De Lausanne (Epfl)
Most cited
By later US patents
- Ionic semiconductor materials and applications thereof795US 5,055,171 AT and G Corporation · 1991
- Electrolyser and components therefor190US 8,057,646 B2Hydrogenics Corporation · 2011
- Offshore wind turbine with multiple wind rotors and floating system156US 7,075,189 B2Ocean Wind Energy Systems · 2006
- Electrolysis of carbon dioxide in aqueous media to carbon monoxide and hydrogen for production of methanol141US 7,704,369 B2University of Southern California · 2010
- Optimizing photovoltaic-electrolyzer efficiency138US 7,906,007 B2GM Global Technology Operations LLC · 2011