Methods and systems for treating phosphogypsum-containing water
US-12570559-B2 · Mar 10, 2026 · US
Sulfates of ammonium (C01C1/14 takes precedence)
Sulfates of ammonium (C01C1/14 takes precedence) · 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 | C01C1/24 |
| Official title | Sulfates of ammonium (C01C1/14 takes precedence) |
| Display label | Sulfates of ammonium (C01C1/14 takes precedence) |
| Total patents | 40 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membrane Concentration of Dissolved Species
US-2026001037-A1 · Jan 1, 2026 · US
Methods of reducing dinitrogen
US-12371334-B2 · Jul 29, 2025 · US
Method for preparing cathode active material precursor for secondary battery, and preparation apparatus using same
US-11827524-B2 · Nov 28, 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 preparing cathode active material precursor for secondary battery, and preparation apparatus using same
US-2021163306-A1 · Jun 3, 2021 · US
Enzyme reaction reagent having dried form and method for preparing the same
US-10837051-B2 · Nov 17, 2020 · US
Compositions and methods for removing air pollutants
US-10780394-B2 · Sep 22, 2020 · US
Urea-containing fertilizers and process for production thereof
US-10752559-B2 · Aug 25, 2020 · US
Device and method for purifying sulfur dioxide and nitrogen oxide in flue gas
US-10730010-B2 · Aug 4, 2020 · US
Device and method for purifying sulfur dioxide and nitrogen oxide in flue gas
US-2020023309-A1 · Jan 23, 2020 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-10513714-B2 · Dec 24, 2019 · US
Granulating ammonium sulfate
US-10512886-B2 · Dec 24, 2019 · US
Method of producing ammonium persulfate
US-2019323133-A1 · Oct 24, 2019 · US
Process for treating lignocellulosic feedstock comprising wet oxidation
US-10421667-B2 · Sep 24, 2019 · US
Determination of rna in blood or other fluids
US-2019153427-A1 · May 23, 2019 · US
Compositions and methods for removing air pollutants
US-2019143267-A1 · May 16, 2019 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-2019106718-A1 · Apr 11, 2019 · US
Urea-containing fertilizers and process for production thereof
US-2018370865-A1 · Dec 27, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01C1/24?
- CPC C01C1/24 is the Cooperative Patent Classification code for “Sulfates of ammonium (C01C1/14 takes precedence).”
- How many patents are filed under CPC C01C1/24 (Sulfates of ammonium (C01C1/14 takes precedence))?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC C01C1/24 growing?
- Publication counts under this code: 2 in 2023 vs 1 in 2025 (latest complete years).