Process for the preparation of a stable, homogeneous, extract free or nearly free from secondary reaction products
US6207164A · kind A · utility
24Cited by
5References
68Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1997 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Sep 3, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K36/8962
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for the preparation of a stable, homogenous extract of plants or plant parts is disclosed. The process comprises mixing and extracting the plants or plant parts charged in a fresh and/or dried state with at least one solvent and at least one agent (having various disclosed properties), then filtering insoluble compounds to obtain a filtrate which is substantially free of secondary reaction products and contains a native compound mixture. The filtrate is concentrated to a spissum extract and the pressure used for the concentration is adjusted according to the vapor pressure of the solvent(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.