Method for manufacturing porous carbon sheet and porous carbon sheet
US-2024327221-A1 · Oct 3, 2024 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C01P2004/04 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 3,041 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 185 |
| 2016 | 214 |
| 2017 | 196 |
| 2018 | 215 |
| 2019 | 299 |
| 2020 | 270 |
| 2021 | 295 |
| 2022 | 320 |
| 2023 | 320 |
| 2024 | 354 |
| 2025 | 312 |
| 2026 | 61 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of preparing positive electrode active material precursor and positive electrode active material precursor
US-12100837-B2 · Sep 24, 2024 · US
Lithium nickel-based composite oxide as a positive electrode active material for rechargeable lithium-ion batteries
US-2024300824-A1 · Sep 12, 2024 · US
Crystalline Sp-Sp2 Hybridized Carbon Allotropes through Dynamic Covalent Synthesis
US-2024286903-A1 · Aug 29, 2024 · US
Methods, devices and compositions for modular production of carbon nanomaterials from acetylene using microwave catalysis
US-2024158235-A1 · May 16, 2024 · US
Composite anode active material, anode and lithium battery comprising same, and method of preparing same
US-2024072247-A1 · Feb 29, 2024 · US
Iron oxide magnetic particles
US-2024058449-A1 · Feb 22, 2024 · US
Ceria-zirconia complex oxide material and method for producing same
US-2015375202-A1 · Dec 31, 2015 · US
Compositions and medical devices for controlled release of nitric oxide and methods of production thereof
US-9216198-B2 · Dec 22, 2015 · US
Composite spherical polymer particles and their production process, and cosmetics using the same
US-9205033-B2 · Dec 8, 2015 · US
Effect Pigments
US-2015344677-A1 · Dec 3, 2015 · US
Zinc oxide particles, method for production of the same, and cosmetic, heat releasing filler, heat releasing resin composition, heat releasing grease, and heat releasing coating composition comprising the same
US-9199857-B2 · Dec 1, 2015 · US
Nanocrystals containing CdTe core with CdS and ZnS coatings
US-9202867-B2 · Dec 1, 2015 · US
Oxide, semiconductor device, module, and electronic device
US-2015329371-A1 · Nov 19, 2015 · US
Organic solvent dispersion containing flaky titanium oxide, method for production of the dispersion, titanium oxide film using the dispersion, and method for production of the titanium oxide film
US-9187339-B2 · Nov 17, 2015 · US
One-pot synthesis of Nb2O5-doped TiO2 nanoparticles
US-9183993-B2 · Nov 10, 2015 · US
Negative electrode active material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
US-2015311519-A1 · Oct 29, 2015 · US
Apparatus for producing carbon-coated nanoparticles and carbon nanospheres
US-9166170-B1 · Oct 20, 2015 · US
Nanoporous Vanadium Oxide Aerogels and Methods of Preparation
US-2015284258-A1 · Oct 8, 2015 · US
Synthesis of nanosized sodium titanates
US-9145304-B2 · Sep 29, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01P2004/04?
- CPC C01P2004/04 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01P2004/04 (Chemistry & Metallurgy)?
- Our database includes 3,041 publications tagged with this CPC code.
- Is patent activity under CPC C01P2004/04 growing?
- Publication counts under this code: 354 in 2024 vs 312 in 2025 (latest complete years).