(under subclass 665) Processes involving the overt treatment of a liquid with a gaseous material.
(1) Note. This subclass includes only those treatments wherein there is a desired and intentional contact between a gas and a liquid, e.g., whipping, aerating, foaming, carbonating, steaming, etc..
SEE OR SEARCH THIS CLASS, SUBCLASS:
487+, for a method of removing air, unwanted gas, or an unwanted odoriferous material from a liquid, wherein the liquid treated may contact air.
489, for a method of removing a desired liquid from a solid wherein the desired liquid may have contacted air.
492+, for the vaporization of a liquid to effect a separation.
506+, for a method of contacting a solid food with steam. 519, for a method of mixing or agitation wherein air or a different gas may be inadvertently incorporated into a food.
SEE OR SEARCH CLASS
62, Refrigeration,
69+, for processes including agitating of a confined body of a material during freezing wherein air or gas is introduced into a material being frozen; subclass 121 for processes specialized to cooling a material involving gas-liquid contact.
95, Gas Separation: Processes,
149+, for processes of gas separation involving liquid contacting.
159, Concentrating Evaporators,
47+, for methods of drying liquids.
203, Distillation: Processes, Separatory,
49, for processes directed to passing a normally gaseous substance through a material being distilled.
