Method and system for producing high-carbon dri using syngas
US-2018371560-A1 · Dec 27, 2018 · US
Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06)
Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06) · 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 | C07C9/04 |
| Official title | Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06) |
| Display label | Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06) |
| Total patents | 171 |
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 | 12 |
| 2016 | 16 |
| 2017 | 17 |
| 2018 | 20 |
| 2019 | 26 |
| 2020 | 20 |
| 2021 | 19 |
| 2022 | 12 |
| 2023 | 14 |
| 2024 | 10 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Non-flammable Electrolyte Containing Liquefied Gas and Lithium Secondary Batteries Containing Same
US-2018375156-A1 · Dec 27, 2018 · US
Methane Conversion
US-2018273442-A1 · Sep 27, 2018 · US
Electrochemical carbon dioxide converter and liquid regenerator
US-2018265993-A1 · Sep 20, 2018 · US
Apparatus and process for the preparation of acetylene and synthesis gas
US-10059640-B2 · Aug 28, 2018 · US
Process for recovery of cracker feed from dry gas
US-10052581-B1 · Aug 21, 2018 · US
Methane gas concentration method
US-9944575-B2 · Apr 17, 2018 · US
Synthesis gas manufacturing method and synthesis gas manufacturing apparatus
US-2018093886-A1 · Apr 5, 2018 · US
Configurations and methods for nitrogen rejection, LNG and NGL production from high nitrogen feed gases
US-9920986-B2 · Mar 20, 2018 · US
Method and device for gas processing
US-9919982-B2 · Mar 20, 2018 · US
Methanation catalyst
US-9908104-B2 · Mar 6, 2018 · US
Nickel-M-alumina xerogel catalyst, method for preparing the same, and method for preparing methane using the catalyst
US-9878961-B2 · Jan 30, 2018 · US
Gas separation membrane, gas separation module, gas separation apparatus, and gas separation method
US-2018021741-A1 · Jan 25, 2018 · US
Gas separation membrane, gas separation module, gas separation apparatus, and gas separation method
US-2018021740-A1 · Jan 25, 2018 · US
Catalysts for thermochemical fuel production and method of producing fuel using thermochemical fuel production
US-9873109-B2 · Jan 23, 2018 · US
Process for production of methane-containing gas mixture
US-9840446-B2 · Dec 12, 2017 · US
Natural gas refining apparatus and system
US-2017327758-A1 · Nov 16, 2017 · US
Methanation catalyst
US-9802872-B2 · Oct 31, 2017 · US
Hydrocarbon dehydrocyclization in the presence of carbon dioxide
US-9796643-B2 · Oct 24, 2017 · US
Multistage Membrane Separation and Purification Process and Apparatus for Separating High Purity Methane Gas
US-2017283292-A1 · Oct 5, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C9/04?
- CPC C07C9/04 is the Cooperative Patent Classification code for “Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06).”
- How many patents are filed under CPC C07C9/04 (Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06))?
- Our database includes 171 publications tagged with this CPC code.
- Is patent activity under CPC C07C9/04 growing?
- Publication counts under this code: 10 in 2024 vs 4 in 2025 (latest complete years).