Organic compound, perovskite precursor solution, perovskite film, perovskite cell, and electric apparatus
US-2025386725-A1 · Dec 18, 2025 · US
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Ammonium phosphates
Ammonium phosphates · 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 | C01B25/28 |
| Official title | Ammonium phosphates |
| Display label | Ammonium phosphates |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods of reducing dinitrogen
US-12371334-B2 · Jul 29, 2025 · US
Method of recovering and reusing phosphoric acid from fermentation broth or fermentation waste liquid
US-2025236522-A1 · Jul 24, 2025 · US
Method to make phosphoric acid and ammonium phosphates from phosphate minerals
US-12351456-B2 · Jul 8, 2025 · US
Process for preparing trialkylammonium dihydrogen phosphates
US-2024228427-A1 · Jul 11, 2024 · US
Process for preparing trialkylammonium dihydrogen phosphates
US-11932588-B2 · Mar 19, 2024 · US
Process for preparing trialkylammonium dihydrogen phosphates
US-2023159432-A1 · May 25, 2023 · US
Mixtures of ammonium polyphosphate and at least one soluble ionic compound containing sulfate and/or is capable of releasing sulfate ions
US-11628589-B2 · Apr 18, 2023 · US
Methods of reducing dinitrogen
US-2022396491-A1 · Dec 15, 2022 · US
Method for production of ammonium phosphate from phosphate rock slurry
US-11261088-B2 · Mar 1, 2022 · US
Method to make phosphoric acid and ammonium phosphates from phosphate minerals
US-2021292169-A1 · Sep 23, 2021 · US
Method to make phosphoric acid and ammonium phosphates from phosphate minerals
US-11027975-B2 · Jun 8, 2021 · US
Method for production of ammonium phosphate from phosphate rock slurry
US-2021114878-A1 · Apr 22, 2021 · US
Negative electrode active material for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method for producing negative electrode material for non-aqueous electrolyte secondary battery
US-10833323-B2 · Nov 10, 2020 · US
Method to make phosphoric acid and ammonium phosphates from phosphate minerals
US-2020247674-A1 · Aug 6, 2020 · US
Negative electrode active material for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method for producing negative electrode material for non-aqueous electrolyte secondary battery
US-2019214637-A1 · Jul 11, 2019 · US
Mixtures of ammonium polyphosphate and at least one soluble ionic compound containing sulfate and/or is capable of releasing sulfate ions
US-2018304493-A1 · Oct 25, 2018 · US
Claus plant preprocessing systems and methods for removal of ammonia from claus plant feed gases
US-9181095-B2 · Nov 10, 2015 · US
Ammonia recovery with purge for corrosion control
US-2015183649-A1 · Jul 2, 2015 · US
Corrosion control in ammonia extraction by air sparging
US-2015175433-A1 · Jun 25, 2015 · US