Integrated process for the production of formaldehyde-stabilized urea
US-10077235-B2 · Sep 18, 2018 · US
Preparation or purification of gas mixtures for ammonia synthesis
Preparation or purification of gas mixtures for ammonia synthesis · 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 | C01B3/025 |
| Official title | Preparation or purification of gas mixtures for ammonia synthesis |
| Display label | Preparation or purification of gas mixtures for ammonia synthesis |
| Total patents | 262 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 23 |
| 2017 | 16 |
| 2018 | 22 |
| 2019 | 25 |
| 2020 | 29 |
| 2021 | 36 |
| 2022 | 16 |
| 2023 | 27 |
| 2024 | 24 |
| 2025 | 22 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for producing ammonia synthesis gas
US-2018072580-A1 · Mar 15, 2018 · US
Process for producing a synthesis gas
US-2017349435-A1 · Dec 7, 2017 · US
A process for the elimination of volatile organic compounds and hazardous air pollutants in ammonia plants
US-2017320728-A1 · Nov 9, 2017 · US
Waste heat recovery in a chemical process and plant, particularly for the synthesis of ammonia
US-9810104-B2 · Nov 7, 2017 · US
Process for production of ammonia and derivatives, in particular urea
US-2017283371-A1 · Oct 5, 2017 · US
A method for revamping an ammonia plant
US-2017260060-A1 · Sep 14, 2017 · US
Production of ammonia make-up syngas with cryogenic purification
US-2017253481-A1 · Sep 7, 2017 · US
Process for oil recovery
US-2017247604-A1 · Aug 31, 2017 · US
Method for preparation of ammonia gas and co2 for a urea synthesis process
US-2017210703-A1 · Jul 27, 2017 · US
Vent line for use in ammonia and hydrogen plants
US-9695058-B2 · Jul 4, 2017 · US
System and method for supplying an energy grid with energy from an intermittent renewable energy source
US-2017145915-A1 · May 25, 2017 · US
System for manufacturing aromatic compound and method for manufacturing same
US-2017137345-A1 · May 18, 2017 · US
Methods and systems for making ammonia in a double ammonia converter system
US-9643856-B2 · May 9, 2017 · US
System and method for load balancing of intermittent renewable energy for an electricity grid
US-2017122129-A1 · May 4, 2017 · US
Producing low methane syngas from a two-stage gasifier
US-9611437-B2 · Apr 4, 2017 · US
Methods and systems for producing and processing syngas in a pressure swing adsorption unit and making ammonia therefrom
US-9561968-B2 · Feb 7, 2017 · US
Method for revamping a front-end of an ammonia plant
US-2017029282-A1 · Feb 2, 2017 · US
Method for reducing co2 emissions in the operation of a metallurgical plant
US-2016319381-A1 · Nov 3, 2016 · US
Method for preparation of ammonia gas and co2 for a urea synthesis process
US-2016318855-A1 · Nov 3, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B3/025?
- CPC C01B3/025 is the Cooperative Patent Classification code for “Preparation or purification of gas mixtures for ammonia synthesis.”
- How many patents are filed under CPC C01B3/025 (Preparation or purification of gas mixtures for ammonia synthesis)?
- Our database includes 262 publications tagged with this CPC code.
- Is patent activity under CPC C01B3/025 growing?
- Publication counts under this code: 24 in 2024 vs 22 in 2025 (latest complete years).