C25B 1/16
Hydroxides
Official title: Hydroxides (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34)
C25B1/16 (Hydroxides) appears on 177 US grants and 260 published applications in this corpus.
Search patents in C25B- Granted patents
- 177
- Published applications
- 260
- Assignees
- 177
- Inventors
- 566
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 3 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 2 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 5 |
| 2011 | 1 | 9 |
| 2012 | 2 | 11 |
| 2013 | 6 | 7 |
| 2014 | 2 | 7 |
| 2015 | 11 | 14 |
| 2016 | 5 | 12 |
| 2017 | 8 | 12 |
| 2018 | 6 | 4 |
| 2019 | 7 | 11 |
| 2020 | 7 | 11 |
| 2021 | 8 | 15 |
| 2022 | 6 | 15 |
| 2023 | 11 | 22 |
| 2024 | 15 | 33 |
| 2025 | 14 | 40 |
| 2026 | 9 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Resource utilization method of crude sodium sulfate22 Sep 2026US 12,741,871 B2Hunan Fortune Environmental Technology Co., LTD.
- Process for producing lithium salts16 Jun 2026US 12,655,498 B2Tenova Advanced Technologies Ltd.
- Multilayered anode in liquid based electrolysis19 May 2026US 12,630,936 B2National Research Council of Canada
- Direct production of lithium hydroxide from brine by electrochemical flow cells12 May 2026US 12,623,932 B2The Regents of the University of Michigan
- Alkali hydroxide production from alkali sulfate with halogen or carboxylic acid intermediates5 May 2026US 12,618,162 B2Innovator Energy, LLC
- Direct air capture of carbon dioxide17 Sep 2026US 2026/0273467 A1Carbon Utility LLC
- Recovery of li-salts from ores10 Sep 2026US 2026/0265071 A1Adionics
- Operating an electrochemical cell in the context of processing lithium-containing water3 Sep 2026US 2026/0258563 A1Evonik Operations GmbH
- Carbon Dioxide Valorization Through Cation-Gradient Carbon Dioxide Capture and Electrolysis Coupled to Electrochemical Electrolyte Decarbonation27 Aug 2026US 2026/0249245 A1Dioxycle
- Method for manufacturing lithium hydroxide20 Aug 2026US 2026/0242229 A1Idemitsu Kosan Co., Ltd.
Most cited
By later US patents
- Electrochemical methods for production of alkali metal hydroxides without the co-production of chlorine139US 5,246,551 AChemetics International Company Ltd. · 1993
- Gas diffusion anode and CO2 cathode electrolyte system100US 7,993,500 B2Calera Corporation · 2011
- Electrochemical conversion of anhydrous hydrogen halide to halogen gas using a cation-transporting membrane83US 5,411,641 AE. I. Du Pont de Nemours and Company · 1995
- Electrolysis of alkali metal salts with hydrogen depolarized anodes80US 4,561,945 AUnited Technologies Corporation · 1985
- Apparatus and process for electrochemically decomposing salt solutions to form the relevant base and acid77US 5,595,641 ADeNora Permelec S.p.A. · 1997