C25B 1/34
Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of
Official title: Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
C25B1/34 (Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of) appears on 733 US grants and 533 published applications in this corpus.
Search patents in C25B- Granted patents
- 733
- Published applications
- 533
- Assignees
- 328
- Inventors
- 1,468
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 31 | 0 |
| 1978 | 44 | 0 |
| 1979 | 41 | 0 |
| 1980 | 54 | 0 |
| 1981 | 48 | 0 |
| 1982 | 44 | 0 |
| 1983 | 26 | 0 |
| 1984 | 25 | 0 |
| 1985 | 13 | 0 |
| 1986 | 26 | 0 |
| 1987 | 15 | 0 |
| 1988 | 13 | 0 |
| 1989 | 5 | 0 |
| 1990 | 9 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 1 |
| 2003 | 0 | 3 |
| 2004 | 3 | 5 |
| 2005 | 1 | 5 |
| 2006 | 3 | 1 |
| 2007 | 0 | 7 |
| 2008 | 1 | 6 |
| 2009 | 3 | 15 |
| 2010 | 6 | 12 |
| 2011 | 8 | 15 |
| 2012 | 13 | 30 |
| 2013 | 12 | 16 |
| 2014 | 10 | 13 |
| 2015 | 17 | 26 |
| 2016 | 9 | 26 |
| 2017 | 19 | 33 |
| 2018 | 13 | 26 |
| 2019 | 19 | 31 |
| 2020 | 24 | 23 |
| 2021 | 19 | 36 |
| 2022 | 23 | 50 |
| 2023 | 18 | 45 |
| 2024 | 23 | 50 |
| 2025 | 19 | 37 |
| 2026 | 11 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electrode for electrolysis12 May 2026US 12,624,469 B2LG Chem.Ltd.
- System and method for controlling a multi-state electrochemical cell28 Apr 2026US 12,612,708 B2Aeon Blue Technologies, Inc.
- Combined current carrier circulation chamber and frame for use in unipolar electrochemical devices14 Apr 2026US 12,601,070 B2Key Dh IP Inc./IP Strategiques Dh, Inc.
- Electrolyzer, and method for producing electrolyzer10 Mar 2026US 12,571,115 B2Asahi Kasei Kabushiki Kaisha
- Operation support method, operation support device, operation support system, and operation support program10 Mar 2026US 12,571,117 B2Asahi Kasei Kabushiki Kaisha
- An integrated resource recovery and co-treatment system of desalination brine and flue gas via waste brine electrolysis and sustainable co2 mineralisation (from brine to newseawater)17 Sep 2026US 2026/0273466 A1Nanyang Technological University
- Electrolytic cell unit3 Sep 2026US 2026/0258565 A1Tokuyama Corporation
- Method for Preparing Hypochlorous Acid Solutions Having Different Concentrations, Hypochlorous Acid Solutions and Uses Thereof27 Aug 2026US 2026/0248136 A1Crawford Global Limited
- Electro-synthetic or electro-energy cells with liquid features27 Aug 2026US 2026/0250871 A1Hysata Pty Ltd
- Mitigating chloride ion oxidation during saline water electrolysis for hydrogen production and carbon dioxide mineralization6 Aug 2026US 2026/0225925 A1The Regents of the University of California
Most cited
By later US patents
- Sulfonic acid electrolytic cell having flourinated polymer membrane with hydration product less than 22,000254US 4,358,545 AThe Dow Chemical Company · 1982
- 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
- Electrochemical process for producing chlorine dioxide solutions from chlorites91US 5,106,465 AOlin Corporation · 1992
- Ion-exchange structures of copolymer blends useful in electrolytic cells88US 4,176,215 AE. I. Du Pont de Nemours and Company · 1979
- Process for producing alkali metal hydroxide84US 4,065,366 AAsahi Glass Company, Limited · 1977