C25B 15/085
Removing impurities
Official title: {Removing impurities}
C25B15/085 (Removing impurities) appears on 298 US grants and 517 published applications in this corpus.
Search patents in C25B- Granted patents
- 298
- Published applications
- 517
- Assignees
- 315
- Inventors
- 1,220
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 3 |
| 2004 | 2 | 9 |
| 2005 | 1 | 7 |
| 2006 | 3 | 4 |
| 2007 | 3 | 2 |
| 2008 | 1 | 9 |
| 2009 | 2 | 13 |
| 2010 | 0 | 6 |
| 2011 | 4 | 5 |
| 2012 | 6 | 13 |
| 2013 | 8 | 18 |
| 2014 | 7 | 11 |
| 2015 | 10 | 17 |
| 2016 | 7 | 24 |
| 2017 | 12 | 11 |
| 2018 | 7 | 17 |
| 2019 | 16 | 23 |
| 2020 | 18 | 22 |
| 2021 | 14 | 40 |
| 2022 | 24 | 43 |
| 2023 | 18 | 48 |
| 2024 | 31 | 61 |
| 2025 | 30 | 67 |
| 2026 | 12 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Portable hydrogen-oxygen generator22 Sep 2026US 12,742,246 B2Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- 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
- Apparatuses, systems, and methods for generating nitric oxide28 Jul 2026US 12,692,611 B2Nanjing Novlead Biotechnology Co., Ltd.
- Method for preparing nano-graphene oxide by electrochemically exfoliating carbon fiber material21 Jul 2026US 12,686,618 B2Zhejiang University
- Geothermal hydrogen production system14 Jul 2026US 12,680,181 B2Good Water Energy Ltd.
- Scalable automated oxyhydrogen-production, storage, and utilization system8 Oct 2026US 2026/0308773 A1Enertopia Corp.
- Additives for improved electrolyzer durability8 Oct 2026US 2026/0308791 A1The Lubrizol Corporation
- Lye outlet within a lye filter24 Sep 2026US 2026/0284562 A1John Cockerill Hydrogen Belgium
- Electrolytic sulfuric acid supply apparatus and water replacement method for electrolytic sulfuric acid supply apparatus24 Sep 2026US 2026/0286536 A1SCREEN Holdings Co., Ltd.
- Water electrolysis system17 Sep 2026US 2026/0275540 A1Honda Motor Co., Ltd.
Most cited
By later US patents
- Electrolyser and components therefor190US 8,057,646 B2Hydrogenics Corporation · 2011
- Hydrogen and oxygen gas generating system69US 5,690,797 AMitsubishi Corporation · 1997
- Methods and devices for the production of hydrocarbons from carbon and hydrogen sources63US 8,277,631 B2Principle Energy Solutions, Inc. · 2012
- Process and apparatus for controlling impurities and pollution from membrane chlor-alkali cells58US 4,242,185 AIonics, Incorporated · 1980
- Process of preparing alkali peroxide solutions49US 5,702,585 AMetallgesellschaft Aktiengesellschaft · 1997