Process for controlling hydrogen sulfide and ammonia flow rates
US-2026001033-A1 · Jan 1, 2026 · US
Preparation from ammonia and sulfuric acid or sulfur trioxide
Preparation from ammonia and sulfuric acid or sulfur trioxide · 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 | C01C1/242 |
| Official title | Preparation from ammonia and sulfuric acid or sulfur trioxide |
| Display label | Preparation from ammonia and sulfuric acid or sulfur trioxide |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for controlling hydrogen sulfide and ammonia flow rates
US-12485384-B2 · Dec 2, 2025 · US
Production of sulfuric acid employing an o2 rich stream
US-2024417256-A1 · Dec 19, 2024 · US
Method for recycling supercritical waste liquid generated during process of producing silica aerogel blanket
US-12157672-B2 · Dec 3, 2024 · US
Method and reactor for producing urea ammonium sulphate
US-11993557-B2 · May 28, 2024 · US
Method for recovering ammonia
US-2024158248-A1 · May 16, 2024 · US
Process for managing hydrogen sulfide in a refinery
US-11708267-B2 · Jul 25, 2023 · US
Method to produce a urea ammonium sulphate-based composition
US-2023219885-A1 · Jul 13, 2023 · US
Method of Recovering Nitrogen and Sulfur Resources Through Anaerobic Fermentation
US-2023048768-A1 · Feb 16, 2023 · US
Process for controlling hydrogen sulfide and ammonia flow rates
US-2023046451-A1 · Feb 16, 2023 · US
Process for managing hydrogen sulfide in a refinery
US-2022194794-A1 · Jun 23, 2022 · US
Method and reactor for producing urea ammonium sulphate
US-2021155582-A1 · May 27, 2021 · US
Integrated process and plant for production of urea and UAS (urea-ammonium sulphate) mixtures
US-10870584-B2 · Dec 22, 2020 · US
Method for recycling supercritical waste liquid generated during process of producing silica aerogel blanket
US-2020231453-A1 · Jul 23, 2020 · US
Integrated process and plant for production of urea and uas (urea-ammonium sulphate) mixtures
US-2019276325-A1 · Sep 12, 2019 · US
Production of ammonium sulfate using a vacuum absorption process
US-10053369-B2 · Aug 21, 2018 · US
Nutrient recovery process
US-9822020-B2 · Nov 21, 2017 · US
Wet scrubber apparatus for ammonia capture
US-9808758-B2 · Nov 7, 2017 · US
Production of ammonium sulfate using a vacuum absorption process
US-2017291825-A1 · Oct 12, 2017 · US
Methods and systems for producing ammonia
US-2017210632-A1 · Jul 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01C1/242?
- CPC C01C1/242 is the Cooperative Patent Classification code for “Preparation from ammonia and sulfuric acid or sulfur trioxide.”
- How many patents are filed under CPC C01C1/242 (Preparation from ammonia and sulfuric acid or sulfur trioxide)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC C01C1/242 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).