US PATENT SUBCLASS 62 / 69
.~.~.~ Introducing gas, e.g., air


Current as of: June, 1999
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62 /   HD   REFRIGERATION

56  DF  PROCESSES {28}
66  DF  .~ Congealing flowable material, e.g., ice making {5}
68  DF  .~.~ Agitating {1}
69.~.~.~ Introducing gas, e.g., air {1}
70  DF  .~.~.~.~> By injecting


DEFINITION

Classification: 62/69

(under subclass 68) Processes wherein air or gas is introduced in a material being frozen.

(1) Note. Processes of freezing and incorporating a gas into the material being frozen is proper for Class 62; however any additional food working step would cause the patent to be classified in Class 426.

SEE OR SEARCH CLASS

261, Gas and Liquid Contact Apparatus,

83+, for such apparatus utilizing rotating means.