Systems, methods, and techniques for processing hydrogen sulfide
US-2026078001-A1 · Mar 19, 2026 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C01B17/04 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Generate hydrogen as fuel at natural gas processing plant to reduce carbon dioxide emissions
US-12510243-B2 · Dec 30, 2025 · US
Processes to Clean Tail Gas from Carbon Black Production and System and Facility for Same
US-2025367600-A1 · Dec 4, 2025 · US
Simultaneous h2 production and co2 capture from acid gas stream
US-2025222396-A1 · Jul 10, 2025 · US
Composite material and use thereof in desulfurization
US-12233397-B2 · Feb 25, 2025 · US
Molecular sieve complex, composite material and application thereof
US-12233396-B2 · Feb 25, 2025 · US
Generate Hydrogen as Fuel at Natural Gas Processing Plant to Reduce Carbon Dioxide Emissions
US-2024271779-A1 · Aug 15, 2024 · US
Improving sulfur recovery operations with processes based on novel CO2 over SO2 selective membranes and its combinations with SO2 over CO2 selective membranes
US-12017180-B2 · Jun 25, 2024 · US
Reduction of chalcopyrite by an aqueous phase reducant to enable hydrometallurgical extraction of copper
US-2024060199-A1 · Feb 22, 2024 · US
Low temperature plasma reaction device and hydrogen sulfide decomposition method
US-11691119-B2 · Jul 4, 2023 · US
Composite material and use thereof in desulfurization
US-2023149892-A1 · May 18, 2023 · US
Molecular sieve complex, composite material and application thereof
US-2023149891-A1 · May 18, 2023 · US
Improving sulfur recovery operations with processes based on novel co2 over so2 selective membranes and its combinations with so2 over co2 selective membranes
US-2023001349-A1 · Jan 5, 2023 · US
Hydrogen sulfide production method and sulfur recovery method
US-11459236-B2 · Oct 4, 2022 · US
Activated metal low temperature reaction processes and products
US-2022234029-A1 · Jul 28, 2022 · US
Electrocatalytic hydrogen recovery from hydrogen sulfide and application of the circular hydrogen economy for hydrotreatment
US-2022205113-A1 · Jun 30, 2022 · US
Activated metal low temperature reaction processes and products
US-11298682-B2 · Apr 12, 2022 · US
Process for hydrogen sulfide scrubbing and method for ferric ion regeneration
US-11198828-B2 · Dec 14, 2021 · US
Method for treating sulfur hexafluoride using radiation and apparatus for collecting and treating by-products
US-11058984-B2 · Jul 13, 2021 · US
Method for production of sulfur and sulfuric acid
US-10981788-B2 · Apr 20, 2021 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B17/04?
- CPC C01B17/04 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01B17/04 (Chemistry & Metallurgy)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC C01B17/04 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).