Functionalized silica nanoparticles for lead adsorption
US-12533653-B2 · Jan 27, 2026 · US
by wet processes
by wet processes · 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 | C22B13/04 |
| Official title | {by wet processes} |
| Display label | by wet processes |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 9 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Functionalized silica nanoparticles for lead adsorption
US-2025360484-A1 · Nov 27, 2025 · US
Functionalized silica nanoparticles for lead adsorption
US-12458948-B1 · Nov 4, 2025 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-2025226473-A1 · Jul 10, 2025 · US
Functionalized silica nanoparticles for lead adsorption
US-12311337-B1 · May 27, 2025 · US
Crosslinked structure, metal-trapping material including said crosslinked structure, method for recovering metal using said metal-trapping material, and method for manufacturing said crosslinked structure
US-2025128236-A1 · Apr 24, 2025 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-12278352-B2 · Apr 15, 2025 · US
Systems and methods for closed-loop recycling of a liquid component of a leaching mixture when recycling lead from spent lead-acid batteries
US-2024194962-A1 · Jun 13, 2024 · US
Systems and methods for closed-loop recycling of a liquid component of a leaching mixture when recycling lead from spent lead-acid batteries
US-11923518-B2 · Mar 5, 2024 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-2024021905-A1 · Jan 18, 2024 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-11791505-B2 · Oct 17, 2023 · US
Method for preparing lead directly from lead-containing material by solid phase reaction
US-11519054-B2 · Dec 6, 2022 · US
Recycling of lead-containing waste
US-2022081315-A1 · Mar 17, 2022 · US
Method for liquid-to-solid phase separation of uranium and uranyl contaminant from various solutions
US-2022072509-A1 · Mar 10, 2022 · US
Systems and methods for closed-loop recycling of a liquid component of a leaching mixture when recycling lead from spent lead-acid batteries
US-11005129-B2 · May 11, 2021 · US
Methods and devices for isolating lead 203
US-10910123-B2 · Feb 2, 2021 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-2020411921-A1 · Dec 31, 2020 · US
Method for preparing lead directly from lead-containing material by solid phase reaction
US-2020377971-A1 · Dec 3, 2020 · US
Methods for purifying and recycling lead from spent lead-acid batteries
US-10777858-B2 · Sep 15, 2020 · US
Systems and methods for closed-loop recycling of a liquid component of a leaching mixture when recycling lead from spent lead-acid batteries
US-2020235443-A1 · Jul 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B13/04?
- CPC C22B13/04 is the Cooperative Patent Classification code for “by wet processes.”
- How many patents are filed under CPC C22B13/04 (by wet processes)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC C22B13/04 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).