C25B 9/00
Cells or assemblies of cells
Official title: Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
C25B9/00 (Cells or assemblies of cells) appears on 4,576 US grants and 6,773 published applications in this corpus.
Search patents in C25B- Granted patents
- 4,576
- Published applications
- 6,773
- Assignees
- 2,255
- Inventors
- 11,454
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 64 | 0 |
| 1977 | 67 | 0 |
| 1978 | 67 | 0 |
| 1979 | 38 | 0 |
| 1980 | 56 | 0 |
| 1981 | 80 | 0 |
| 1982 | 82 | 0 |
| 1983 | 65 | 0 |
| 1984 | 74 | 0 |
| 1985 | 50 | 0 |
| 1986 | 50 | 0 |
| 1987 | 47 | 0 |
| 1988 | 50 | 0 |
| 1989 | 43 | 0 |
| 1990 | 36 | 0 |
| 1991 | 27 | 0 |
| 1992 | 30 | 0 |
| 1993 | 35 | 0 |
| 1994 | 39 | 0 |
| 1995 | 34 | 0 |
| 1996 | 25 | 0 |
| 1997 | 32 | 0 |
| 1998 | 43 | 0 |
| 1999 | 42 | 0 |
| 2000 | 44 | 0 |
| 2001 | 47 | 12 |
| 2002 | 41 | 42 |
| 2003 | 33 | 41 |
| 2004 | 33 | 77 |
| 2005 | 32 | 58 |
| 2006 | 25 | 63 |
| 2007 | 26 | 81 |
| 2008 | 41 | 98 |
| 2009 | 25 | 101 |
| 2010 | 37 | 122 |
| 2011 | 53 | 121 |
| 2012 | 69 | 155 |
| 2013 | 73 | 202 |
| 2014 | 94 | 236 |
| 2015 | 145 | 255 |
| 2016 | 136 | 294 |
| 2017 | 170 | 294 |
| 2018 | 182 | 261 |
| 2019 | 243 | 336 |
| 2020 | 199 | 335 |
| 2021 | 222 | 380 |
| 2022 | 243 | 502 |
| 2023 | 296 | 587 |
| 2024 | 304 | 782 |
| 2025 | 364 | 799 |
| 2026 | 223 | 539 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C25B 9/17Cells comprising dimensionally-stable non-movable electrodes2,934
- C25B 9/70Assemblies comprising two or more cells1,696
- C25B 9/60Constructional parts of cells1,095
- C25B 9/05Pressure cells373
- C25B 9/13Single electrolytic cells with circulation of an electrolyte230
- C25B 9/01Electrolytic cells characterised by shape or form220
- C25B 9/40Cells or assemblies of cells comprising electrodes made of particles109
- C25B 9/30Cells comprising movable electrodes89
Recent patents
- Hydrogen production cathode and anode6 Oct 2026US 12,753,518 B2Civilized Power, LLC
- 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
- Electrolysis cell, electrolyzer and method for reducing CO26 Oct 2026US 12,753,522 B2Covestro Intellectual Property GmbH & Co.KG
- Aqueous Zn||NO2 electrochemical cell6 Oct 2026US 12,756,037 B2City University of Hong Kong
- System and methods of water electrolysis29 Sep 2026US 12,747,509 B2Schlumberger Technology Corporation
- Ammonia cracker8 Oct 2026US 2026/0308771 A1
- 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.
- System and Methods for Controlling Material Synthesis via Electrochemical Reactions8 Oct 2026US 2026/0308774 A1Quantom Corporation
- 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
- Apparatus for manipulating droplets by electrowetting-based techniques444US 6,911,132 B2Duke University · 2005
- Deposition of catalytic electrodes on ion-exchange membranes254US 4,364,803 AOronzio de Nora Impianti Elettrochimici S.p.A. · 1982
- Proton conducting polymers used as membranes200US 5,525,436 ACase Western Reserve University · 1996
- High pressure electrolyzer module197US 6,554,978 B1Vandenborre Technologies NV · 2003