Method for preparing pregabalin
US-11919835-B2 · Mar 5, 2024 · US
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Preparation of optical isomers
Preparation of optical isomers · 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 | C07C227/30 |
| Official title | Preparation of optical isomers |
| Display label | Preparation of optical isomers |
| Total patents | 11 |
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 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for preparing pregabalin
US-2021114972-A1 · Apr 22, 2021 · US
Process for making mixtures of chelating agents
US-2020062695-A1 · Feb 27, 2020 · US
Process for making mixtures of chelating agents
US-10519097-B2 · Dec 31, 2019 · US
5-substituted-5-hydroxy-5-aryl-3-oxo-pentanoate derivatives and their enantiopure forms
US-10125074-B2 · Nov 13, 2018 · US
5-substituted-5-hydroxy-5-aryl-3-oxo-pentanoate derivatives and their enantiopure forms
US-2018118648-A1 · May 3, 2018 · US
Process for making mixtures of chelating agents
US-2018105486-A1 · Apr 19, 2018 · US
Solutions of trialkali metal salts of MGDA with an excess of L-enantiomer, their manufacture and use
US-9873659-B2 · Jan 23, 2018 · US
Solutions of trialkali metal salts of aminocarboxylic acids, their manufacture and use
US-2017247318-A1 · Aug 31, 2017 · US
Method for producing L-amino acid
US-9464306-B2 · Oct 11, 2016 · US
Optical resolution methods for bicyclic compounds using asymmetric catalysts
US-9035103-B2 · May 19, 2015 · US