A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
A23G9/04—Production of frozen sweets, e.g. ice-cream
A23G9/06—Production of frozen sweets, e.g. ice-cream characterised by using carbon dioxide or carbon dioxide snow or other cryogenic agents as cooling medium