Process for extracting catechin polyphenols from potentillas, extract obtained and its use
US5928646A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Apr 1, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for extracting essentially oligomeric catechin polyphenols from a potentilla plant, including the steps: treating at least part of the plant with a polar organic solvent to form a first extract, evaporating the first extract to dryness at a temperature of not more than 60.degree. C. to form an evaporation residue, adding water to the evaporation residue to form an aqueous solution, exhaustively extracting the solution with a water-immiscible solvent capable of dissolving oligomeric catechin polyphenols to form an organic solution, evaporating the organic solution to dryness at a temperature of not more than 60.degree. C. to form a second extract of essentially oligomeric catechin polyphenols. The second extract can be used as a compound having a free radical-scavenging action and/or action against UV rays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.