C01C 1/28
Methods of preparing ammonium salts in general
C01C1/28 (Methods of preparing ammonium salts in general) appears on 34 US grants and 38 published applications in this corpus.
Search patents in C01C- Granted patents
- 34
- Published applications
- 38
- Assignees
- 32
- Inventors
- 100
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 1 |
| 2011 | 0 | 3 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 1 | 4 |
| 2016 | 2 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 4 |
| 2019 | 3 | 1 |
| 2020 | 4 | 3 |
| 2021 | 2 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 3 |
| 2024 | 2 | 3 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for removing ammonia from an ammonia-containing effluent, and method for the same20 Jan 2026US 12,528,716 B2Nijhuis Water Technology B.V.
- Process for desorption of ammonia chemical species using carbon dioxide, ammonia chemical species-providing agent, and apparatus for adsorption and desorption of ammonia chemical species2 Jul 2024US 12,023,648 B2National Institute of Advanced Industrial Science and Technology
- Leaching method of scheelite4 Jun 2024US 11,999,626 B1Chongyi Zhangyuan Tungsten Co., Ltd
- Integrated processes for treatment of an ammonium fluorosulfate byproduct of the production of bis (fluorosulfonyl) imide3 Oct 2023US 11,772,967 B2Honeywell International Inc.
- Methods for quantifying nitrogen-containing compounds in subterranean treatment fluids4 Oct 2022US 11,460,464 B2Halliburton Energy Services.Inc.
- Ambient, Catalyst-Free Synthesis of Ammonia, Amino Acids, and Urea via Bubble-Induced Microenvironments31 Jul 2025US 2025/0243129 A1
- System and method for recovery of fertilizer building blocks from waste20 Feb 2025US 2025/0059076 A1West Virginia University Board of Governors on behalf of West Virginia University
- Systems & methods for ammonia recovery, acid gas separation, or combination thereof15 Aug 2024US 2024/0270587 A1Solvcor Technologies LLC
- A system for removing ammonia from an ammonia-containing effluent, and method for the same.25 Apr 2024US 2024/0132376 A1Nijhuis Water Technology B.V.
- Process for producing an ammonium sulfite and bisulfite solution from ammonia gas18 Apr 2024US 2024/0124318 A1ThioSolv, LLC
Most cited
By later US patents
- Recovery of inorganic salt during processing of lignocellulosic feedstocks52US 7,585,652 B2Iogen Energy Corporation · 2009
- Process for manufacturing ammonium salts33US 6,117,406 AKaltenbach-Thuring S.A. · 2000
- Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide23US 7,258,848 B1E. I. Du Pont de Nemours and Company · 2007
- Recovery of inorganic salt during processing of lignocellulosic feedstocks17US 8,247,203 B2Iogen Energy Corporation · 2012
- Methods for the evaporation of an aqueous solution containing ammonia12US 6,638,398 B1Hadwaco Ltd Oy · 2003