Circular economy methods of preparing unsaturated compounds
US-2017362155-A1 · Dec 21, 2017 · US
Carbon
Carbon · 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 | C07C2521/18 |
| Official title | Carbon |
| Display label | Carbon |
| Total patents | 189 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 22 |
| 2017 | 29 |
| 2018 | 15 |
| 2019 | 30 |
| 2020 | 16 |
| 2021 | 17 |
| 2022 | 18 |
| 2023 | 12 |
| 2024 | 10 |
| 2025 | 5 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the preparation of 2,2′-bis-indenyl biphenyl ligands and their metallocene complexes
US-9828447-B2 · Nov 28, 2017 · US
Method for isomerizing an aromatic C8 fraction in the presence of a catalyst containing an EUO zeolite and a specific binder
US-9828311-B2 · Nov 28, 2017 · US
Farnesane alkylation
US-2017334807-A1 · Nov 23, 2017 · US
Farnesane alkylation
US-9822046-B1 · Nov 21, 2017 · US
Acyclic monoterpenes as biofuels based on linalool and method for making the same
US-9816043-B1 · Nov 14, 2017 · US
High density diamondoid fuels from renewable oils, triglycerides, and fatty acids
US-9790445-B1 · Oct 17, 2017 · US
Use of catalyst prepared with a subgroup VI element for the production of organic chemicals and fuels from lignin
US-9789473-B2 · Oct 17, 2017 · US
Conversion of polyester-containing feedstocks into hydrocarbon products
US-9790138-B2 · Oct 17, 2017 · US
Stabilized rhenium-based heterogeneous catalyst and use thereof
US-2017291161-A1 · Oct 12, 2017 · US
Catalytic biomass conversion methods, catalysts, and methods of making the same
US-9783474-B2 · Oct 10, 2017 · US
Synthesis of fuels and feedstocks
US-9783477-B2 · Oct 10, 2017 · US
Polymer-supported transition catalyst
US-2017283343-A1 · Oct 5, 2017 · US
High density turbine and diesel fuels from tricyclic sesquiterpenes
US-9777234-B1 · Oct 3, 2017 · US
Process for converting paraffin to olefin and catalyst for use therein
US-2017267609-A1 · Sep 21, 2017 · US
Renewable diamondoid fuels
US-9758737-B1 · Sep 12, 2017 · US
Conversion of oligomeric starch, cellulose, hydrolysates or sugars to hydrocarbons
US-9751815-B2 · Sep 5, 2017 · US
High density diamondoid fuels from renewable oils, triglycerides, and fatty acids
US-9738843-B1 · Aug 22, 2017 · US
Process for converting paraffin to olefin and catalyst for use therein
US-2017190639-A9 · Jul 6, 2017 · US
Method of converting levulinic acid or a derivative thereof to hydrocarbons and hydrogen, and methods of the production of hydrocarbons and hydrogen
US-2017183274-A1 · Jun 29, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C2521/18?
- CPC C07C2521/18 is the Cooperative Patent Classification code for “Carbon.”
- How many patents are filed under CPC C07C2521/18 (Carbon)?
- Our database includes 189 publications tagged with this CPC code.
- Is patent activity under CPC C07C2521/18 growing?
- Publication counts under this code: 10 in 2024 vs 5 in 2025 (latest complete years).