System and method for recovery of fertilizer building blocks from waste
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Methods of preparing ammonium salts in general
Methods of preparing ammonium salts in general · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01C1/28 |
| Official title | Methods of preparing ammonium salts in general |
| Display label | Methods of preparing ammonium salts in general |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing ammoniacal nitrogen
US-2024239673-A1 · Jul 18, 2024 · US
Process for desorption of ammonia chemical species using carbon dioxide, ammonia chemical species-providing agent, and apparatus for adsorption and desorption of ammonia chemical species
US-12023648-B2 · Jul 2, 2024 · US
Integrated processes for treatment of an ammonium fluorosulfate byproduct of the production of bis (fluorosulfonyl) imide
US-11772967-B2 · Oct 3, 2023 · US
Methods for quantifying nitrogen-containing compounds in subterranean treatment fluids
US-11460464-B2 · Oct 4, 2022 · US
Integrated processes for treatment of an ammonium fluorosulfate byproduct of the production of bis(fluorosulfonyl) imide
US-2022212929-A1 · Jul 7, 2022 · US
Process for desorption of ammonia chemical species using carbon dioxide, ammonia chemical species-providing agent, and apparatus for adsorption and desorption of ammonia chemical species
US-2021387164-A1 · Dec 16, 2021 · US
Production system and method of production for product selected from nitrogen-containing product and fermented and cultured product
US-10941427-B2 · Mar 9, 2021 · US
Methods For Quantifying Nitrogen-Containing Compounds In Subterranean Treatment Fluids
US-2020278337-A1 · Sep 3, 2020 · US
Treatment method of an aqueous solution containing urea, ammonia and carbon dioxide and treatment equipment therefor
US-10730761-B2 · Aug 4, 2020 · US
Methods for quantifying nitrogen-containing compounds in subterranean treatment fluids
US-10718749-B2 · Jul 21, 2020 · US
High purity HCN from acrylonitrile co-production
US-10647663-B2 · May 12, 2020 · US
Ammonia synthesis using a catalytic nitrogen-selective membrane
US-10556803-B2 · Feb 11, 2020 · US
Treatment method of an aqueous solution containing urea, ammonia and carbon dioxide and treatment equipment therefor
US-2019177180-A1 · Jun 13, 2019 · US
Method for detecting impurities in ammonium hydroxide
US-10309937-B2 · Jun 4, 2019 · US
High purity hcn from acrylonitrile co-production
US-2018208548-A1 · Jul 26, 2018 · US
Methods for quantifying nitrogen-containing compounds in subterranean treatment fluids
US-2018080917-A1 · Mar 22, 2018 · US
Production System and Method of Production for Product Selected from Nitrogen-Containing Product and Fermented and Cultured Product
US-2017342449-A1 · Nov 30, 2017 · US
Method for detecting impurities in ammonium hydroxide
US-2017219538-A1 · Aug 3, 2017 · US
Urea hydrolysis reactor for selective catalytic reduction
US-2016074809-A1 · Mar 17, 2016 · US