C25B 9/77
Having diaphragms
Official title: having diaphragms
C25B9/77 (Having diaphragms) appears on 742 US grants and 1,078 published applications in this corpus.
Search patents in C25B- Granted patents
- 742
- Published applications
- 1,078
- Assignees
- 452
- Inventors
- 2,201
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 10 | 0 |
| 1978 | 11 | 0 |
| 1979 | 9 | 0 |
| 1980 | 15 | 0 |
| 1981 | 18 | 0 |
| 1982 | 19 | 0 |
| 1983 | 14 | 0 |
| 1984 | 18 | 0 |
| 1985 | 12 | 0 |
| 1986 | 12 | 0 |
| 1987 | 15 | 0 |
| 1988 | 17 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 12 | 0 |
| 2001 | 9 | 2 |
| 2002 | 11 | 9 |
| 2003 | 6 | 5 |
| 2004 | 5 | 13 |
| 2005 | 3 | 5 |
| 2006 | 5 | 9 |
| 2007 | 3 | 13 |
| 2008 | 7 | 17 |
| 2009 | 2 | 11 |
| 2010 | 8 | 13 |
| 2011 | 10 | 9 |
| 2012 | 10 | 14 |
| 2013 | 9 | 14 |
| 2014 | 14 | 26 |
| 2015 | 11 | 29 |
| 2016 | 12 | 34 |
| 2017 | 20 | 30 |
| 2018 | 31 | 30 |
| 2019 | 24 | 42 |
| 2020 | 30 | 43 |
| 2021 | 23 | 60 |
| 2022 | 33 | 85 |
| 2023 | 42 | 108 |
| 2024 | 47 | 168 |
| 2025 | 68 | 160 |
| 2026 | 50 | 129 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrolysis cell, electrolyzer and method for reducing CO26 Oct 2026US 12,753,522 B2Covestro Intellectual Property GmbH & Co.KG
- Multi-cell COx electrolyzer stacks29 Sep 2026US 12,747,510 B2Twelve Benefit Corporation
- Device and method for carbon dioxide electrolysis or carbon monoxide electrolysis22 Sep 2026US 12,742,248 B2Siemens Energy Global GmbH & Co. KG
- Alkaline electrolysis arrangement with deaerator and method therefor15 Sep 2026US 12,735,798 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Impedance monitoring of a modular electrolysis system25 Aug 2026US 12,716,141 B2Ohmium International, Inc.
- Electrolyzer8 Oct 2026US 2026/0308781 A1
- Manifold insert for an electrochemical system1 Oct 2026US 2026/0302304 A1New Hydrogen IP, LLC
- Electrochemical electrode structure, electrochemical cell, bipolar electrode assembly, electrochemical cell arrangement, and method of attaching an electrode element to a supportive element of an electrochemical electrode structure for an electrochemical cell24 Sep 2026US 2026/0286549 A1thyssenkrupp nucera AG & Co. KGaA
- Process for manufacturing at least one portion of an electrolytic cell, corresponding electrolytic cell portion and electrolyzer stack24 Sep 2026US 2026/0286550 A1John Cockerill Hydrogen Belgium
- Selective transport layer for a proton exchange membrane24 Sep 2026US 2026/0290868 A1GM Global Technology Operations LLC
Most cited
By later US patents
- High pressure electrolyzer module197US 6,554,978 B1Vandenborre Technologies NV · 2003
- Electrolyser and components therefor190US 8,057,646 B2Hydrogenics Corporation · 2011
- Low cost bipolar current collector-separator for electrochemical cells160US 4,214,969 AGeneral Electric Company · 1980
- Polymer electrolyte membrane fuel cells and stacks with adhesively bonded layers96US 6,080,503 ABallard Power Systems Inc. · 2000
- Membrane electrochemical cell provided with gas diffusion electrodes in contact with porour, flat, metal current conductors having highly distributed contact area91US 6,022,634 ADe Nora S.p.A. · 2000