C25C 7/04
Diaphragms
Official title: Diaphragms; Spacing elements
C25C7/04 (Diaphragms) appears on 119 US grants and 170 published applications in this corpus.
Search patents in C25C- Granted patents
- 119
- Published applications
- 170
- Assignees
- 119
- Inventors
- 410
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 2 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 2 | 1 |
| 2014 | 1 | 8 |
| 2015 | 3 | 8 |
| 2016 | 3 | 8 |
| 2017 | 1 | 3 |
| 2018 | 3 | 12 |
| 2019 | 7 | 3 |
| 2020 | 5 | 8 |
| 2021 | 4 | 4 |
| 2022 | 8 | 13 |
| 2023 | 12 | 25 |
| 2024 | 15 | 18 |
| 2025 | 10 | 24 |
| 2026 | 6 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrochemical cell and process for producing metal and chlorine gas18 Aug 2026US 12,709,814 B2University of Oregon
- Method and apparatus for extracting lithium from solution using bipolar electrodes30 Jun 2026US 12,668,887 B2Central South University
- Ore dissolution and iron conversion system17 Mar 2026US 12,577,696 B2Electrasteel, Inc.
- Method and system for extracting metal and oxygen from powdered metal oxides27 Jan 2026US 12,534,818 B2Airbus Defence and Space GmbH
- Cerium oxide nanoparticles, methods for fabricating the same and methods for fabricating a semiconductor device using the same27 Jan 2026US 12,534,819 B2Industry-Academic Cooperation Foundation, Yonsei University
- Method and reactor for the production of alkali metal8 Oct 2026US 2026/0308792 A1Electriq-Global Energy Solutions Ltd.
- Process and system for electrolytically producing an iron-bearing product from iron ore particles1 Oct 2026US 2026/0297782 A1Fortescue Future Industries Pty Ltd
- Apparatus and method for conducting electrolysis and electrode unit for such an apparatus17 Sep 2026US 2026/0275559 A1Atotech Deutschland GmbH
- Methods for transforming silicate-containing materials into materials for co2 removal and other applications3 Sep 2026US 2026/0258567 A1Massachusetts Institute of Technology
- Liquid-liquid extraction system for electroactive metal electrodeposition from brine20 Aug 2026US 2026/0242970 A1Pure Lithium Corporation
Most cited
By later US patents
- Supported liquid membrane electrochemical separators53US 4,592,973 ACastle Technology Corp. · 1986
- Preparation of lithium carbonate from lithium chloride containing brines48US 9,034,294 B1Simbol Inc. · 2015
- Membrane block construction and electrochemical cell37US 4,361,475 AInnova, Inc. · 1982
- Mass-transfer membrane and processes using same30US 4,124,458 AInnova, Inc. · 1978
- Solid electrolytic material and use thereof30US 4,279,974 ANgk Spark Plug Co., Ltd. · 1981