C01C 1/022
Preparation of aqueous ammonia solutions, i.e. ammonia water
Official title: {Preparation of aqueous ammonia solutions, i.e. ammonia water}
C01C1/022 (Preparation of aqueous ammonia solutions, i.e. ammonia water) appears on 17 US grants and 17 published applications in this corpus.
Search patents in C01C- Granted patents
- 17
- Published applications
- 17
- Assignees
- 22
- Inventors
- 57
- Latest grant
- 20 Jun 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
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| 1995 | 0 | 0 |
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| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
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| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 3 | 1 |
| 2019 | 1 | 3 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 2 | 0 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ammonia synthesis using plasma-produced electrons20 Jun 2023US 11,679,988 B2Case Western Reserve University
- System for ammonia distillation1 Nov 2022US 11,485,645 B2The Boeing Company
- Thermal energy apparatus and related methods5 Jul 2022US 11,380,830 B2The Boeing Company
- Manufacturing system of electronic-grade ammonia solution10 Dec 2019US 10,501,329 B2Mega Union Technology Inc.
- System and method for recycling rare earth and ammonia nitrogen from rare earth wastewater14 Aug 2018US 10,046,979 B2China University of Geosciences (Wuhan)
- Method for recovering ammonia16 Jul 2026US 2026/0200747 A1Posco
- Methods for preparing amorphous calcium carbonate by fixation of carbon dioxide2 Jul 2026US 2026/0184589 A1Amorphical Ltd.
- Process and device for preparing ultra-clean high-purity ammonia water12 Mar 2026US 2026/0070798 A1Jiangsu Meiyang Electronic Chemicals Co., LTD
- Nitrogen battery, fuel synthesis apparatus, and fuel synthesis method11 Dec 2025US 2025/0379290 A1Kabushiki Kaisha Toyota Chuo Kenkyusho
- Dissolved ammonia delivery system and methods of use13 Jun 2024US 2024/0189780 A1MKS Instruments, Inc.
Most cited
By later US patents
- Process and apparatus for producing high-purity chemicals for the microelectronics industry14US 6,183,720 B2Air Liquide Electronics Labeille · 2001
- Method and apparatus for preparing chemical solutions12US 7,144,552 B1Fujitsu Limited · 2006
- Process for manufacture of ultra-high purity ammonium hydroxide6US 5,746,993 AAdvanced Micro Devices, Inc. · 1998
- Aqueous ammonia process and mixing apparatus therefor5US 4,752,452 AUnion Oil Company of California · 1988
- Removal of hydrogen sulfide as ammonium sulfate from hydropyrolysis product vapors3US 8,859,831 B2Gas Technology Institute · 2014