C25B 9/19
With diaphragms
Official title: with diaphragms
C25B9/19 (With diaphragms) appears on 2,401 US grants and 3,740 published applications in this corpus.
Search patents in C25B- Granted patents
- 2,401
- Published applications
- 3,740
- Assignees
- 1,284
- Inventors
- 6,505
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 18 | 0 |
| 1978 | 14 | 0 |
| 1979 | 11 | 0 |
| 1980 | 23 | 0 |
| 1981 | 32 | 0 |
| 1982 | 33 | 0 |
| 1983 | 33 | 0 |
| 1984 | 30 | 0 |
| 1985 | 21 | 0 |
| 1986 | 17 | 0 |
| 1987 | 15 | 0 |
| 1988 | 24 | 0 |
| 1989 | 19 | 0 |
| 1990 | 15 | 0 |
| 1991 | 10 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 23 | 0 |
| 1995 | 18 | 0 |
| 1996 | 15 | 0 |
| 1997 | 19 | 0 |
| 1998 | 28 | 0 |
| 1999 | 26 | 0 |
| 2000 | 22 | 0 |
| 2001 | 28 | 8 |
| 2002 | 27 | 17 |
| 2003 | 19 | 25 |
| 2004 | 18 | 36 |
| 2005 | 16 | 33 |
| 2006 | 16 | 30 |
| 2007 | 14 | 39 |
| 2008 | 19 | 47 |
| 2009 | 14 | 40 |
| 2010 | 22 | 35 |
| 2011 | 25 | 55 |
| 2012 | 27 | 82 |
| 2013 | 28 | 103 |
| 2014 | 53 | 132 |
| 2015 | 76 | 165 |
| 2016 | 83 | 158 |
| 2017 | 106 | 159 |
| 2018 | 99 | 141 |
| 2019 | 125 | 192 |
| 2020 | 119 | 221 |
| 2021 | 135 | 228 |
| 2022 | 148 | 266 |
| 2023 | 175 | 344 |
| 2024 | 175 | 435 |
| 2025 | 206 | 449 |
| 2026 | 128 | 300 |
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
- 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
- Multi-cell COx electrolyzer stacks29 Sep 2026US 12,747,510 B2Twelve Benefit Corporation
- Ammonia cracker8 Oct 2026US 2026/0308771 A1
- Co2 and h2o co-electrolyser system8 Oct 2026US 2026/0308775 A1Ecole Polytechnique Federale De Lausanne (Epfl)
- Components for electrolytic apparatus and electrolytic apparatus8 Oct 2026US 2026/0308777 A1Robert Bosch GmbH
- Electrode composition for proton exchange membrane water electrolysis, electrode for proton exchange membrane water electrolysis, anode, membrane-electrode assembly, and proton exchange membrane water electrolysis cell8 Oct 2026US 2026/0308785 A1Hyundai Motor Company
- Oxygen evolution reaction catalyst and method for its preparation8 Oct 2026US 2026/0308786 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- 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
- Membrane electrode assembly181US 5,879,828 AMinnesota Mining and Manufacturing Company · 1999
- Production of halogens in an electrolysis cell with catalytic electrodes bonded to an ion transporting membrane and an oxygen depolarized cathode156US 4,191,618 AGeneral Electric Company · 1980
- Process of manufacturing porous separator for electrochemical power supply154US 5,948,464 AImra America, Inc. · 1999