Method of recovering lithium precursor, method of preparing positive electrode active material, and rechargeable lithium battery
US-2025239673-A1 · Jul 24, 2025 · US
Nitric acids or salts thereof
Nitric acids or salts thereof · 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 | C22B3/065 |
| Official title | {Nitric acids or salts thereof} |
| Display label | Nitric acids or salts thereof |
| Total patents | 74 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 14 |
| 2024 | 12 |
| 2025 | 5 |
| 2026 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for controlling metal dissolution using an electrical current
US-2024363260-A1 · Oct 31, 2024 · US
Method for recycling an led
US-2024343969-A1 · Oct 17, 2024 · US
Method of recovering active metal of lithium secondary battery
US-2024318280-A1 · Sep 26, 2024 · US
Method and electrochemical system for recycling spent lithium-ion battery
US-2024279831-A1 · Aug 22, 2024 · US
Systems and processes for recovery of high-grade rare earth concentrate from acid mine drainage
US-2024279768-A1 · Aug 22, 2024 · US
Preparation of rare earth metals and other chemicals from industrial waste coal ash
US-2024271247-A1 · Aug 15, 2024 · US
Method for clean metallurgy of molybdenum
US-11959152-B2 · Apr 16, 2024 · US
Recycling system, recycling method, method for manufacturing electrode, and method for manufacturing battery
US-2024097224-A1 · Mar 21, 2024 · US
Method for recycling hydrophobic deep eutectic solvent and nickel leaching method
US-2024076548-A1 · Mar 7, 2024 · US
Method for stripping uranium(vi) and an actinide(iv) from an organic solution by oxalic precipitation
US-2024079157-A1 · Mar 7, 2024 · US
Method for selective extraction of gold by niacin
US-2024018624-A1 · Jan 18, 2024 · US
Preparation of rare earth metals and other chemicals from industrial waste coal ash
US-11866804-B2 · Jan 9, 2024 · US
Rare earth enrichment process by contacting raw material with a base at specific pH values
US-11827954-B2 · Nov 28, 2023 · US
Recycling method for mixed waste material of lithium nickel manganese cobalt oxide and lithium iron phosphate
US-2023332267-A1 · Oct 19, 2023 · US
Method for recovering valuable material from perovskite solar cell
US-2023304125-A1 · Sep 28, 2023 · US
Method for recovering lithium and method for producing lithium carbonate
US-2023295770-A1 · Sep 21, 2023 · US
Method for treating sulfide
US-2023295766-A1 · Sep 21, 2023 · US
method for recovering rare-earth in cerium-based rare-earth polishing powder waste by two-step acid leaching gradient separation
US-2023265541-A1 · Aug 24, 2023 · US
Supercritical fluid-enhanced selective extraction of rare earth elements
US-2023249100-A1 · Aug 10, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B3/065?
- CPC C22B3/065 is the Cooperative Patent Classification code for “Nitric acids or salts thereof.”
- How many patents are filed under CPC C22B3/065 (Nitric acids or salts thereof)?
- Our database includes 74 publications tagged with this CPC code.
- Is patent activity under CPC C22B3/065 growing?
- Publication counts under this code: 12 in 2024 vs 5 in 2025 (latest complete years).