C25B 9/73
Of the filter-press type
Official title: of the filter-press type
C25B9/73 (Of the filter-press type) appears on 1,289 US grants and 1,895 published applications in this corpus.
Search patents in C25B- Granted patents
- 1,289
- Published applications
- 1,895
- Assignees
- 724
- Inventors
- 3,480
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 18 | 0 |
| 1978 | 14 | 0 |
| 1979 | 10 | 0 |
| 1980 | 19 | 0 |
| 1981 | 24 | 0 |
| 1982 | 27 | 0 |
| 1983 | 20 | 0 |
| 1984 | 25 | 0 |
| 1985 | 16 | 0 |
| 1986 | 14 | 0 |
| 1987 | 20 | 0 |
| 1988 | 23 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 8 | 0 |
| 1994 | 12 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 14 | 0 |
| 2001 | 11 | 3 |
| 2002 | 12 | 10 |
| 2003 | 6 | 8 |
| 2004 | 8 | 22 |
| 2005 | 5 | 8 |
| 2006 | 7 | 17 |
| 2007 | 4 | 19 |
| 2008 | 11 | 21 |
| 2009 | 3 | 19 |
| 2010 | 10 | 33 |
| 2011 | 13 | 29 |
| 2012 | 19 | 31 |
| 2013 | 14 | 38 |
| 2014 | 28 | 61 |
| 2015 | 32 | 79 |
| 2016 | 36 | 98 |
| 2017 | 49 | 95 |
| 2018 | 62 | 95 |
| 2019 | 81 | 128 |
| 2020 | 84 | 106 |
| 2021 | 77 | 106 |
| 2022 | 89 | 118 |
| 2023 | 71 | 136 |
| 2024 | 75 | 231 |
| 2025 | 81 | 221 |
| 2026 | 61 | 163 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electrolysis cell, electrolyzer and method for reducing CO26 Oct 2026US 12,753,522 B2Covestro Intellectual Property GmbH & Co.KG
- System and methods of water electrolysis29 Sep 2026US 12,747,509 B2Schlumberger Technology Corporation
- 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
- Casing Structure Design for Electrolytic Cells8 Oct 2026US 2026/0308779 A1Viering, Jentschura & Partner mbB Patent und Rechtsanwälte
- Electrolyzer8 Oct 2026US 2026/0308781 A1
- Plane parallel converging gas flow electrolyzer, cell and use thereof8 Oct 2026US 2026/0308787 A1
- Improving diagnostic measurements during operation of electrolyzers1 Oct 2026US 2026/0297777 A1Fourier Earth, Inc.
- Systems and methods of ammonia synthesis1 Oct 2026US 2026/0297781 A1Ohmium International, Inc.
Most cited
By later US patents
- Ionic semiconductor materials and applications thereof795US 5,055,171 AT and G Corporation · 1991
- 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
- Wind farm generation scheme utilizing electrolysis to create gaseous fuel for a constant output generator112US 5,592,028 A1997