Patent classifications
A
HUMAN NECESSITIES
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A23
FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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A23B
PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
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4/00
Preservation of meat, sausages, fish or fish products
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A23B4/06
Freezing; Subsequent thawing; Cooling
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A23B4/08
with addition of chemicals; or treatment with chemicals; before or during cooling; , e.g. in the form of an ice coating or frozen block
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A23B4/09
with direct contact between the food and the chemical, e.g. liquid N2, at cryogenic temperature
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