Making ethylenediaminetetraacetic acid
US-12234201-B2 · Feb 25, 2025 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C07C255/25 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 29 |
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 | 3 |
| 2018 | 7 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for preparing (dimethylaminomethylene) malononitrile using a micro reaction system
US-11708321-B2 · Jul 25, 2023 · US
Making ethylenediaminetetraacetic acid
US-2022234993-A1 · Jul 28, 2022 · US
Method for preparing (dimethylaminomethylene) malononitrile using a micro reaction system
US-2022089524-A1 · Mar 24, 2022 · US
Production of nitrogen-containing chelators
US-2021403412-A1 · Dec 30, 2021 · US
Production of nitrogen-containing chelators
US-2021403413-A1 · Dec 30, 2021 · US
Production of nitrogen-containing chelators
US-2021403414-A1 · Dec 30, 2021 · US
Ether amine compounds and use thereof as flotation collector
US-10815337-B2 · Oct 27, 2020 · US
Process for making mixtures of enantiomers of MGDA and GLDA
US-10619125-B2 · Apr 14, 2020 · US
Non-aqueous electrolyte additive, and non-aqueous electrolyte for lithium secondary battery comprising the same and lithium secondary battery
US-10601069-B2 · Mar 24, 2020 · US
Crystals of alanine N-acetic acid precursors, process to prepare them and their use
US-10590064-B2 · Mar 17, 2020 · US
Compounds useful as immunomodulators
US-10144706-B2 · Dec 4, 2018 · US
Ether amine compounds and use thereof as flotation collector
US-2018251603-A1 · Sep 6, 2018 · US
Process for making mixtures of enantiomers, and mixtures of enantiomers
US-2018237728-A1 · Aug 23, 2018 · US
Non-aqueous electrolyte additive, and non-aqueous electrolyte for lithium secondary battery comprising the same and lithium secondary battery
US-2018198157-A1 · Jul 12, 2018 · US
Cure accelerators for anaerobic curable compositions
US-9969690-B2 · May 15, 2018 · US
Process for preparing EDA using SO2-free hydrocyanic acid
US-9914693-B2 · Mar 13, 2018 · US
Compounds useful as immunomodulators
US-2018057455-A1 · Mar 1, 2018 · US
Crystals of Alanine N-Acetic Acid Precursors, Process to Prepare Them and Their Use
US-2017334833-A1 · Nov 23, 2017 · US
Cure accelerators for anaerobic curable compositions
US-2017174630-A1 · Jun 22, 2017 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C255/25?
- CPC C07C255/25 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C07C255/25 (Chemistry & Metallurgy)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC C07C255/25 growing?
- Publication counts under this code: 1 in 2023 vs 1 in 2025 (latest complete years).