Process for treating roasted coffee
US4748030A · kind A · utility
Inventor
Key dates
| Filing date | Nov 26, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Nov 26, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23F5/105
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
Roasted coffee beans are delivered to an airtight container. The container is purged with CO.sub.2 or N.sub.2 until the O.sub.2 concentration is between 0.2 and 2%. The container is then sealed and the coffee beans are aged under an atmosphere consisting of CO.sub.2 or N.sub.2 with small amounts of O.sub.2. During the aging process, which involves a liberation by the coffee beans of a gas rich in CO.sub.2, the pressure in the container is maintained between 0.4 and 1.8 atmospheres. Aging may take place at temperatures between 20.degree. and 25.degree. C. and, under such circumstances, the O.sub.2 concentration in the container is maintained within the range of 0.2 to 1% throughout the aging period. The aging period at these temperatures is between 15 days and 31 days. Alternatively, aging may take place at temperatures between 30.degree. and 50.degree. C. The O.sub.2 concentration in the container is then maintained within the range of 0.2 to 2% throughout the aging period which is now only 4 to 10 days.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.