Melamine process with purification of melamine offgas
US-2026062392-A1 · Mar 5, 2026 · US
from urea or from carbon dioxide and ammonia
from urea or from carbon dioxide and ammonia · 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 | C07D251/60 |
| Official title | from urea or from carbon dioxide and ammonia |
| Display label | from urea or from carbon dioxide and ammonia |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 7 |
| 2018 | 6 |
| 2019 | 4 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 6 |
| 2024 | 9 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Urea melamine plant with melamine off-gas condenser
US-2026001852-A1 · Jan 1, 2026 · US
Melamine process with a two-stage purification of melamine offgas
US-12391655-B1 · Aug 19, 2025 · US
Melamine process with a two-stage purification of melamine offgas
US-2025250242-A1 · Aug 7, 2025 · US
Production of urea and melamine
US-12338201-B2 · Jun 24, 2025 · US
Process for the synthesis of melamine
US-2025197362-A1 · Jun 19, 2025 · US
Coupled urea melamine plant
US-12319662-B2 · Jun 3, 2025 · US
Multiproduct low biuret urea production
US-12240800-B2 · Mar 4, 2025 · US
Urea and melamine production
US-12139448-B2 · Nov 12, 2024 · US
Coupled urea melamine production with HP CO2 stripping
US-12134590-B2 · Nov 5, 2024 · US
Coupled urea melamine plant
US-2024327358-A1 · Oct 3, 2024 · US
Production of urea and melamine
US-2024270684-A1 · Aug 15, 2024 · US
Coupled urea melamine production with hp co2 stripping
US-2024270685-A1 · Aug 15, 2024 · US
Multiproduct low biuret urea production
US-2024262789-A1 · Aug 8, 2024 · US
A process and plant for the synthesis of urea and melamine
US-2024262798-A1 · Aug 8, 2024 · US
Urea and melamine production
US-2024262788-A1 · Aug 8, 2024 · US
Process for quenching offgas of melamine synthesis
US-11858903-B2 · Jan 2, 2024 · US
Process for melamine purification
US-11840520-B2 · Dec 12, 2023 · US
Process for melamine purification
US-11834422-B2 · Dec 5, 2023 · US
Plant for the synthesis of melamine with offgas recovery in a tied-in urea plant
US-11666883-B2 · Jun 6, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D251/60?
- CPC C07D251/60 is the Cooperative Patent Classification code for “from urea or from carbon dioxide and ammonia.”
- How many patents are filed under CPC C07D251/60 (from urea or from carbon dioxide and ammonia)?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC C07D251/60 growing?
- Publication counts under this code: 9 in 2024 vs 6 in 2025 (latest complete years).