Sodium sulfate by-product processing in lithium and battery chemical production
US-12522510-B2 · Jan 13, 2026 · US
Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)}
Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)} · 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 | C01D5/00 |
| Official title | Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)} |
| Display label | Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)} |
| Total patents | 28 |
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 | 2 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 8 |
| 2020 | 3 |
| 2021 | 1 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for making crystalline sodium sulfate
US-2025178914-A1 · Jun 5, 2025 · US
Processing hard rock lithium minerals or other materials to produce lithium materials and byproducts converted from a sodium sulfate intermediate product
US-2024425381-A1 · Dec 26, 2024 · US
Method of treating fly ash of a recovery boiler
US-11725341-B2 · Aug 15, 2023 · US
Sodium sulfate by-product processing in lithium and battery chemical production
US-2023052881-A1 · Feb 16, 2023 · US
A powderous lithium cobalt-based oxide cathode active material powder for rechargeable lithium ion batteries and a method for making thereof
US-2023040464-A1 · Feb 9, 2023 · US
Method of Recycling Lead-Acid Battery Waste into Lead Halide for Resource Utilization and Purification
US-2021218081-A1 · Jul 15, 2021 · US
Sulfides Electrolyte for Metal Processing and Extraction
US-2020247670-A1 · Aug 6, 2020 · US
Methods of hydrofluorination
US-10702858-B2 · Jul 7, 2020 · US
Method of treating fly ash of a recovery boiler
US-2020181841-A1 · Jun 11, 2020 · US
Process for dehumidifying moist gas mixtures
US-10512881-B2 · Dec 24, 2019 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-10513714-B2 · Dec 24, 2019 · US
Process for treating lignocellulosic feedstock comprising wet oxidation
US-10421667-B2 · Sep 24, 2019 · US
Method and a system for quality optimization of green liquor
US-10385513-B2 · Aug 20, 2019 · US
Methods of hydrofluorination
US-2019176134-A1 · Jun 13, 2019 · US
Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
US-2019106718-A1 · Apr 11, 2019 · US
Process for making solid particles
US-2019062173-A1 · Feb 28, 2019 · US
Ni based cathode material for rechargeable lithium-ion batteries
US-2019020019-A1 · Jan 17, 2019 · US
Process and absorbent for dehumidifying moist gas mixtures
US-10105644-B2 · Oct 23, 2018 · US
Method and a system for quality optimization of green liquor
US-2018080173-A1 · Mar 22, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01D5/00?
- CPC C01D5/00 is the Cooperative Patent Classification code for “Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)}.”
- How many patents are filed under CPC C01D5/00 (Sulfates or sulfites of sodium, potassium or alkali metals in general {(sulfites in general C01B17/62)})?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC C01D5/00 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).