Proton flow reactor system
US-12438173-B2 · Oct 7, 2025 · US
Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes
Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes · 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 | C01B3/0021 |
| Official title | Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes |
| Display label | Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes |
| Total patents | 65 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 4 |
| 2017 | 8 |
| 2018 | 9 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Carbon-based compositions with highly efficient volumetric gas sorption
US-2024359158-A1 · Oct 31, 2024 · US
High Capacity Hydrogen Storage through Selective Nano-Confined and Localized Hydrogen Hydrates
US-2024336477-A1 · Oct 10, 2024 · US
REVERSIBLE HYDROGEN STORAGE OF AMORPHOUS C60 FULLERENE WITH CARBON DEFECT FACILITATED BY ATOMIC Pt-MEDIATED HYDROGEN SPILLOVER IN AMBIENT CONDITION
US-2024316537-A1 · Sep 26, 2024 · US
Method for preparing reduced graphene oxide-magnesium nanocrystal composite
US-12077439-B2 · Sep 3, 2024 · US
Carbon-based compositions with highly efficient volumetric gas sorption
US-12064747-B2 · Aug 20, 2024 · US
Carbon nanomaterial for gas storage and method for manufacturing the same
US-11807524-B2 · Nov 7, 2023 · US
Carbon-based compositions with highly efficient volumetric gas sorption
US-2023321629-A1 · Oct 12, 2023 · US
Carbon-based compositions with highly efficient volumetric gas sorption
US-11707728-B2 · Jul 25, 2023 · US
Carbon nanomaterial for gas storage and method for manufacturing the same
US-2023192481-A1 · Jun 22, 2023 · US
Proton flow reactor system
US-2023178779-A1 · Jun 8, 2023 · US
LITHIATION INDUCED POROUS Pd NANOPARTICLE/3D GRAPHENE AEROGEL COMPOSITE FOR HIGHLY REVERSIBLE HYDROGEN STORAGE BASED ON SPILLOVER PROCESS
US-2023150813-A1 · May 18, 2023 · US
Process for producing a hydrogen storage means
US-11572272-B2 · Feb 7, 2023 · US
Hydrogen storage material
US-11459234-B2 · Oct 4, 2022 · US
Method for preparing reduced graphene oxide-magnesium nanocrystal composite
US-2022153588-A1 · May 19, 2022 · US
Hydrogen store comprising a composite material, and method for the production thereof
US-11332365-B2 · May 17, 2022 · US
Hydrogen storage composite material and manufacturing method thereof
US-2022048765-A1 · Feb 17, 2022 · US
Carbon material, and method relating to same
US-11214485-B2 · Jan 4, 2022 · US
Carbon-based compositions with highly efficient volumetric gas sorption
US-2021237029-A1 · Aug 5, 2021 · US
Carbon-based hydrogen storage material having autocatalytic capability, production method thereof, and hydrogen adsorbing—storing method, hydrogen releasing method, and hydrogen adsorption—storage device using thereof
US-11072524-B2 · Jul 27, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B3/0021?
- CPC C01B3/0021 is the Cooperative Patent Classification code for “Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes.”
- How many patents are filed under CPC C01B3/0021 (Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes)?
- Our database includes 65 publications tagged with this CPC code.
- Is patent activity under CPC C01B3/0021 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).