Processes for converting unsaturated polyethylene to alkene products
US-2025368586-A1 · Dec 4, 2025 · US
Manganese, technetium or rhenium
Manganese, technetium or rhenium · 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 | C07C2523/656 |
| Official title | Manganese, technetium or rhenium |
| Display label | Manganese, technetium or rhenium |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 8 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods of making light olefins that include modifying catalysts
US-2025368901-A1 · Dec 4, 2025 · US
Methods for making light olefins by dehydrogenation that utilize comubustion additives
US-2025361193-A1 · Nov 27, 2025 · US
Processes for converting saturated polyethylene to alkene products
US-2025230112-A1 · Jul 17, 2025 · US
Method and system embodiments for converting ethanol to para-xylene and ortho-xylene
US-12264116-B2 · Apr 1, 2025 · US
Catalyst and method embodiments for making para-xylene and ortho-xylene
US-2025091036-A1 · Mar 20, 2025 · US
Method for preparing dehydrogenation catalyst for linear chain light hydrocarbons with high regeneration efficiency
US-12145133-B2 · Nov 19, 2024 · US
Catalyst for dehydrogenation of light alkanes
US-12134084-B2 · Nov 5, 2024 · US
Process to produce ethylene and vinyl acetate monomer and derivatives thereof
US-11891357-B2 · Feb 6, 2024 · US
Method and system embodiments for converting ethanol to para-xylene and ortho-xylene
US-11851384-B2 · Dec 26, 2023 · US
Method and system embodiments for converting ethanol to para-xylene and ortho-xylene
US-2023312432-A1 · Oct 5, 2023 · US
Efficient low-temperature, catalyst-free dehydrogenation of alkanes
US-11708312-B2 · Jul 25, 2023 · US
Dehydrogenation catalysts and methods for using them
US-11701643-B2 · Jul 18, 2023 · US
Method and system embodiments for converting ethanol to para-xylene and ortho-xylene
US-2023049093-A1 · Feb 16, 2023 · US
Efficient low-temperature, catalyst-free dehydrogenation of alkanes
US-2023037379-A1 · Feb 9, 2023 · US
Method and system embodiments for converting ethanol to para-xylene and ortho-xylene
US-11325873-B1 · May 10, 2022 · US
Catalyst for dehydrogenation of light alkanes
US-2022111359-A1 · Apr 14, 2022 · US
Dehydrogenation catalysts and methods for using them
US-2022016604-A1 · Jan 20, 2022 · US
Catalyst for dehydrogenation of light alkanes
US-11203010-B2 · Dec 21, 2021 · US
Integrated process for producing olefins from alkanes by hydrogen transfer
US-11136279-B2 · Oct 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C2523/656?
- CPC C07C2523/656 is the Cooperative Patent Classification code for “Manganese, technetium or rhenium.”
- How many patents are filed under CPC C07C2523/656 (Manganese, technetium or rhenium)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC C07C2523/656 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).