Process of manufacturing 2-(4'-diethylamino-2'-hydroxybenzoyl)benzoic acid hexyl ester
US-2024109838-A1 · Apr 4, 2024 · US
Separation; Purification
Separation; Purification · 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 | C07C227/40 |
| Official title | Separation; Purification |
| Display label | Separation; Purification |
| Total patents | 96 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 14 |
| 2017 | 7 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 13 |
| 2021 | 9 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Closed evaporation system
US-11094424-B2 · Aug 17, 2021 · US
Production method for 1-amino cyclopropane carboxylic acid nonhydrate
US-2021139413-A1 · May 13, 2021 · US
Process for preparing guanidino acetic acid
US-10844009-B2 · Nov 24, 2020 · US
An improved process for the preparation of droxidopa and its intermediate
US-2020354308-A1 · Nov 12, 2020 · US
Method for the fermentative production of L-lysine
US-10829746-B2 · Nov 10, 2020 · US
An improved process for the preparation of droxidopa and its intermediate
US-2020299227-A1 · Sep 24, 2020 · US
pH-responsive amphoteric surfactant n-lauryl-(α-alkyl)-β-aminopropionic acid and preparation method and uses thereof
US-10781165-B2 · Sep 22, 2020 · US
Method for the Fermentative Production of L-lysine
US-2020231946-A1 · Jul 23, 2020 · US
Polyaspartic acid ester compositions and method for purification
US-2020223787-A1 · Jul 16, 2020 · US
Polyaspartic acid ester compositions which contain polyaspartic acid esters with primary amino groups and small amounts of fumaric acid dialkyl esters
US-2020216383-A1 · Jul 9, 2020 · US
Process for preparing guanidino acetic acid
US-2020207707-A1 · Jul 2, 2020 · US
Composition made of amino acid or ester with polymer quality and methods for obtaining same
US-10683258-B2 · Jun 16, 2020 · US
Crystalline form of gamma-aminobutyric acid and preparation method thereof
US-10604474-B2 · Mar 31, 2020 · US
Preparation of a solid form of gadobenate dimeglumine
US-2020071341-A1 · Mar 5, 2020 · US
Closed evaporation system
US-2020043620-A1 · Feb 6, 2020 · US
Preparation of a solid form of gadobenate dimeglumine
US-10519171-B2 · Dec 31, 2019 · US
pH-RESPONSIVE AMPHOTERIC SURFACTANT N-LAURYL-(alpha-ALKYL)-beta-AMINOPROPIONIC ACID AND PREPARATION METHOD AND USES THEREOF
US-2019388858-A1 · Dec 26, 2019 · US
Process for preparing aminobenzoic acid or an aminobenzoic acid conversion product
US-2019382812-A1 · Dec 19, 2019 · US
New crystalline form of gamma-aminobutyric acid and preparation method thereof
US-2019225574-A1 · Jul 25, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C227/40?
- CPC C07C227/40 is the Cooperative Patent Classification code for “Separation; Purification.”
- How many patents are filed under CPC C07C227/40 (Separation; Purification)?
- Our database includes 96 publications tagged with this CPC code.
- Is patent activity under CPC C07C227/40 growing?
- Publication counts under this code: 5 in 2024 vs 10 in 2025 (latest complete years).