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US 4,397,873 AGranted
Dark-colored freeze dried coffee
AssigneeGeneral Foods Corporation
InventorStephen F. Hudak
Life of this patent
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Abstract
A dark-colored freeze dried coffee is produced by using a multi-step process to freeze the coffee extract. The coffee extract is chilled to a temperature at which an ice slush forms. The slushed extract is heated in order to melt some of the slush and subsequently re-chilled. This procedure may be repeated one or more times prior to chilling the extract below its eutectic point and freeze drying the frozen extract.
Claims4
A process for producing a dark-colored freeze dried coffee which comprises:
- (a) rapidly chilling an aqueous coffee extract to a temperature between -2.degree. C. and -5.degree. C. whereby a slush forms;
- (b) heating said slushed extract to a temperature slightly below 0.degree. C. whereby some of the slush begins to melt;
- (c) re-chilling the heated extract of step (b) to a temperature from -2.degree. C. to -5.degree. C. and repeating the heating and re-chilling steps one or more times;
- (d) further rapidly chilling said extract to a temperature below its eutectic point whereby the coffee extract is frozen solid;
- and
- (e) freeze drying the frozen extract.
3 more elements
Dependencies are inferred from the claim text.