Method of producing a darkened freeze-dried coffee
US4138502A · kind A · utility
2Cited by
10References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1974 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Jul 17, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23F5/32
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
The color of freeze dried coffee can be darkened by carefully controlling the pressure in the drying chamber during the first 1 to 5 hours of the drying cycle. By maintaining the pressure at between 350 to 650 microns of mercury for the specified time, a surface darkening is achieved without allowing the product to actually melt or puff. Thus, a high quality freeze dried coffee is obtained with a more desirable appearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.