C01D 1/42
Concentration
Official title: Concentration; Dehydration
C01D1/42 (Concentration) appears on 24 US grants and 21 published applications in this corpus.
Search patents in C01D- Granted patents
- 24
- Published applications
- 21
- Assignees
- 23
- Inventors
- 67
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 3 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 2 | 3 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for treating a sodium carbonate purge7 Oct 2025US 12,434,976 B1Solvay SA
- Layered double hydroxide electride and method for producing same29 Jul 2025US 12,371,336 B2Japan Science and Technology Agency
- Process for producing a concentrated aqueous sodium hydroxide solution11 Oct 2022US 11,465,907 B2Solvay SA
- Process for reducing fouling in evaporators in lithium hydroxide recovery30 Mar 2021US 10,961,126 B2Veolia Water Technologies, Inc.
- Apparatus for making and concentrating an aqueous caustic alkali19 Mar 2019US 10,233,551 B2Westlake Vinyl Corporation
- High-efficiency method for producing lithium hydroxide from lithium carbonate through process improvement1 Oct 2026US 2026/0296907 A1Korea Institute of Geoscience and Mineral Resources
- A method for treating waste sodium sulphate obtained from an industrial process, use of waste sodium sulphate obtained from an industrial process and an industrial processing plant18 Jun 2026US 2026/0167509 A1Umicore Battery Materials Finland Oy
- A method for treating waste sodium sulphate obtained from an industrial process of battery industry, use of waste sodium sulphate obtained from an industrial process of battery industry and an industrial processing plant of battery industry18 Jun 2026US 2026/0167581 A1Umicore Battery Materials Finland Oy
- Movable device for extracting lithium salts from brine of salt lakes15 May 2025US 2025/0153106 A1Xi'an Lanshen New Material Technology Co., Ltd.
- Process to produce battery grade lithium hydroxide monohydrate with low content of carbonate13 Mar 2025US 2025/0083969 A1
Most cited
By later US patents
- Method for concentrating aqueous caustic alkali solution8US 4,090,932 AAsahi Kasei Kogyo Kabushiki Kaisha · 1978
- Alkali metal hydroxide generation system and the method therefor8US 5,186,794 ASolar Reactor Technologies, Inc. · 1993
- Evaporation apparatus of special material4US 3,937,646 AHooker Chemicals & Plastics Corporation · 1976
- Concentration process by multistage, multiple effect evaporator4US 4,132,588 AAsahi Kasei Kogyo Kabushiki Kaisha · 1979
- Process for treating a sodium carbonate purge4US 9,593,023 B2Solvay SA · 2017