Process for making a stable green tea extract and product
US5427806A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23F3/205
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A process for the production of green tea extracts is disclosed comprising the steps of (a) extracting tea materials with an acidified aqueous solution comprising erythorbic acid or ascorbic acid and citric acid and mixtures thereof at specified ratios, (b) separating extract from residual tea material (c) mixing the extract containing solution with gelatin, and (d) separating the precipitates formed under a nitrogen blanket. The resultant tea extracts are stable against precipitation, have reduced bitter and astringent flavors, low levels of polymerized or oxidized flavanols and resist browning. The extracts are especially suitable for use in beverages with added colorant where brown color is not desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.