US PATENT SUBCLASS 47 / 2
FROST PREVENTING
Current as of: June, 1999
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DEFINITION
Classification: 47/2
Methods and devices for preventing the freezing of trees and plants and their fruit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3, 9, 17, and 19-32, for devices capable of preventing frost.
SEE OR SEARCH CLASS
126, Stoves and Furnaces,
59.5, for smudge pots.
244, Aeronautics,
136, for means for discharging and diffusing material from aircraft.
252, Compositions, 70, for frost preventing compositions, subclass 305 for smokes, fogs, or gaseous primary dispersants, a period.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
1+, for colloid systems of gas or vapor continuous phase (smokes, fogs, aerosols, clouds, mists) or agents for such systems or making or stabilizing such systems or agents, when generically claimed or when there is no hierarchically
superior provision in the USPC for the specifically claimed art.
