Hierarchical carbon nano and micro structures
US-9221684-B2 · Dec 29, 2015 · US
Preparation
Preparation · 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 | C01B32/16 |
| Official title | Preparation |
| Display label | Preparation |
| Total patents | 779 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 83 |
| 2016 | 76 |
| 2017 | 101 |
| 2018 | 81 |
| 2019 | 82 |
| 2020 | 70 |
| 2021 | 65 |
| 2022 | 53 |
| 2023 | 68 |
| 2024 | 50 |
| 2025 | 43 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Preparation of nitrogen-doped carbon tubes
US-9216900-B2 · Dec 22, 2015 · US
Method for making carbon nanotube composite wire
US-2015360947-A1 · Dec 17, 2015 · US
Electroconductive polyamide resin composition
US-9206048-B2 · Dec 8, 2015 · US
Method for making carbon nanotubes
US-9206049-B2 · Dec 8, 2015 · US
Heat dissipation structure and synthesizing method thereof
US-2015351285-A1 · Dec 3, 2015 · US
Method for producing conductive film
US-2015340117-A1 · Nov 26, 2015 · US
Carbon nanotube foams with controllable mechanical properties
US-2015329961-A1 · Nov 19, 2015 · US
Methods and apparatus for the production of carbon-containing materials
US-9187328-B2 · Nov 17, 2015 · US
Continuous process for the production of nanostructures including nanotubes
US-9181639-B2 · Nov 10, 2015 · US
Aggregate of carbon nanotubes, and production method therefor
US-2015318069-A1 · Nov 5, 2015 · US
Carbon nanotube-graphene composite
US-2015318120-A1 · Nov 5, 2015 · US
Fabrication and application of nanofiber ribbons and sheets and twisted and non-twisted nanofiber yarns
US-2015308018-A1 · Oct 29, 2015 · US
Method for controlling bulk density of carbon nanotube agglomerate
US-2015298974-A1 · Oct 22, 2015 · US
Carbon nanotube array
US-9162892-B2 · Oct 20, 2015 · US
Method for forming carbon nanotube film
US-2015291418-A1 · Oct 15, 2015 · US
Method and apparatus for processing carbon nanotubes
US-2015291425-A1 · Oct 15, 2015 · US
Method for forming carbon nanotube film
US-2015291419-A1 · Oct 15, 2015 · US
Carbon fiber-reinforced silicon carbide composite material and method of preparing the same
US-9156741-B2 · Oct 13, 2015 · US
Carbon nanotube having high specific surface area and method for manufacturing same
US-2015274529-A1 · Oct 1, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B32/16?
- CPC C01B32/16 is the Cooperative Patent Classification code for “Preparation.”
- How many patents are filed under CPC C01B32/16 (Preparation)?
- Our database includes 779 publications tagged with this CPC code.
- Is patent activity under CPC C01B32/16 growing?
- Publication counts under this code: 50 in 2024 vs 43 in 2025 (latest complete years).