Additives to control hydrogen sulfide release of sulfur containing and/or phosphorus containing corrosion inhibitors
US-2018135189-A1 · May 17, 2018 · US
Heterocyclic compounds containing nitrogen as hetero atom
Heterocyclic compounds containing nitrogen as hetero atom · 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 | C23F11/149 |
| Official title | {Heterocyclic compounds containing nitrogen as hetero atom} |
| Display label | Heterocyclic compounds containing nitrogen as hetero atom |
| Total patents | 330 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 20 |
| 2017 | 24 |
| 2018 | 23 |
| 2019 | 35 |
| 2020 | 36 |
| 2021 | 37 |
| 2022 | 26 |
| 2023 | 31 |
| 2024 | 43 |
| 2025 | 32 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Anti-corrosion formulations that are stable during storage
US-9951428-B2 · Apr 24, 2018 · US
Methods for forming peroxyformic acid and uses thereof
US-2018093948-A1 · Apr 5, 2018 · US
Pre-rinse containing a quaternary amine for conditioning prior to a conversion treatment
US-2018066365-A1 · Mar 8, 2018 · US
Corrosion inhibition with alkoxy aromatic imidazolines
US-2017369765-A1 · Dec 28, 2017 · US
Methods for forming peroxyformic acid and uses thereof
US-9845290-B2 · Dec 19, 2017 · US
Fluorescent water treatment compounds and method of use
US-2017355628-A1 · Dec 14, 2017 · US
Corrosion inhibition for aqueous systems using a halogenated triazole
US-2017356093-A1 · Dec 14, 2017 · US
Compositions and methods for corrosion inhibitor monitoring
US-2017355902-A1 · Dec 14, 2017 · US
Liquid Inhibitor Composition And A Method For Its Preparation And Application As A Heavy Brine Corrosion Control
US-2017342311-A1 · Nov 30, 2017 · US
Liquid Inhibitor Composition And A Method For Its Preparation And Application As A Heavy Brine Corrosion Control
US-2017342310-A1 · Nov 30, 2017 · US
Corrosion and fouling mitigation using non-phosphorus based additives
US-9828269-B2 · Nov 28, 2017 · US
Corrosion inhibition
US-2017335467-A1 · Nov 23, 2017 · US
Corrosion inhibiting compositions and coatings including the same
US-9816189-B2 · Nov 14, 2017 · US
2-(p-alkoxyphenyl)-2-imidazolines and their use as corrosion inhibitors
US-9816024-B2 · Nov 14, 2017 · US
Tetrazole based corrosion inhibitors
US-9771336-B2 · Sep 26, 2017 · US
Compositions for corrosion inhibition
US-9771657-B2 · Sep 26, 2017 · US
Mild steel corrosion inhibitor compounds
US-9758878-B2 · Sep 12, 2017 · US
Imidazole compound, metal surface treatment liquid, metal surface treatment method, and laminate production method
US-2017247334-A1 · Aug 31, 2017 · US
Compositions for corrosion inhibition
US-2017218523-A1 · Aug 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23F11/149?
- CPC C23F11/149 is the Cooperative Patent Classification code for “Heterocyclic compounds containing nitrogen as hetero atom.”
- How many patents are filed under CPC C23F11/149 (Heterocyclic compounds containing nitrogen as hetero atom)?
- Our database includes 330 publications tagged with this CPC code.
- Is patent activity under CPC C23F11/149 growing?
- Publication counts under this code: 43 in 2024 vs 32 in 2025 (latest complete years).