Metal extractant and separation recovery method of metal ions using metal extractant
US-2025243560-A1 · Jul 31, 2025 · US
containing at least two amino groups bound to the carbon skeleton
containing at least two amino groups bound to the carbon skeleton · 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 | C07C211/18 |
| Official title | containing at least two amino groups bound to the carbon skeleton |
| Display label | containing at least two amino groups bound to the carbon skeleton |
| Total patents | 50 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 7 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Platinum-group metal recovery agent and platinum-group metal recovery method
US-2025162976-A1 · May 22, 2025 · US
Method for preparing an amine hydrochloride suspension
US-12151997-B2 · Nov 26, 2024 · US
Carbon dioxide absorbent, method for recovering carbon dioxide, and apparatus for separating and recovering carbon dioxide
US-2024367098-A1 · Nov 7, 2024 · US
Compound for capping layer and organic light emitting device including same
US-2024190810-A1 · Jun 13, 2024 · US
Method for Preparing an Amine Hydrochloride Suspension
US-2023271916-A1 · Aug 31, 2023 · US
Production method for cyclohexanedicarboxylic acid compound, dicyanocyclohexane compound and bis(aminomethyl)cyclohexane compound
US-11584705-B2 · Feb 21, 2023 · US
Method for manufacturing bis(aminomethyl)cyclohexane
US-2023040356-A1 · Feb 9, 2023 · US
Method for preparing dicyanoalkane and bis(aminomethyl) alkane
US-11542222-B2 · Jan 3, 2023 · US
Production method for 1,4-cyclohexanedicarboxylic acid derivative, 1,4-dicyanocyclohexane and 1,4-bis(aminomethyl)cyclohexane
US-11472765-B2 · Oct 18, 2022 · US
Method for synthesizing amines
US-11390578-B2 · Jul 19, 2022 · US
Method for synthesizing amines
US-2021155574-A1 · May 27, 2021 · US
Method for preparing dicyanoalkane and bis(aminomethyl)alkane
US-2021139408-A1 · May 13, 2021 · US
Functionalized graphene comprising two or more types of amines, and preparation method therefor
US-10934171-B2 · Mar 2, 2021 · US
Production method for 1,4-cyclohexanedicarboxylic acid derivative, 1,4-dicyanocyclohexane and 1,4-bis(aminomethyl)cyclohexane
US-2021032191-A1 · Feb 4, 2021 · US
Method for producing 1,4-dicyanocyclohexane, 1,4-bis(aminomethyl)cyclohexane and 1,4-cyclohexanedicarboxylic acid
US-10906865-B2 · Feb 2, 2021 · US
Production method for cyclohexanedicarboxylic acid compound, dicyanocyclohexane compound and bis(aminomethyl)cyclohexane compound
US-2021024445-A1 · Jan 28, 2021 · US
Method for preparing an amine hydrochloride suspension
US-2020392074-A1 · Dec 17, 2020 · US
Crosslinked polymer based on a random copolymer and a volatile polyaminated crosslinking agent and processes for producing same
US-10745526-B2 · Aug 18, 2020 · US
Process to convert cyclic alkylene ureas into their corresponding alkylene amines
US-10428010-B2 · Oct 1, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C211/18?
- CPC C07C211/18 is the Cooperative Patent Classification code for “containing at least two amino groups bound to the carbon skeleton.”
- How many patents are filed under CPC C07C211/18 (containing at least two amino groups bound to the carbon skeleton)?
- Our database includes 50 publications tagged with this CPC code.
- Is patent activity under CPC C07C211/18 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).