US PATENT SUBCLASS 404 / 77
.~.~ Heating

Current as of: June, 1999
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404 /   HD   ROAD STRUCTURE, PROCESS, OR APPARATUS

72  DF  PROCESS {6}
75  DF  .~ In situ treatment of earth or roadway {3}
77.~.~ Heating

DEFINITION

Classification: 404/77

(under subclass 75) In situ treatment including the application of external means to raise the temperature of the ground or pavement.

(1) Note. Processes whereby heat is generated by internal chemical reaction are classified elsewhere on the bases of other process steps.

SEE OR SEARCH THIS CLASS, SUBCLASS:

79+, for processes involving heating steps no limited to in situ application.

95, for a means to heat earth or road surface.

SEE OR SEARCH CLASS 34, Drying and Gas or Vapor Contact With Solids, appropriate subclasses for drying paving material.

110, Furnaces, appropriate subclasses for specific heating means.

126, Stoves and Furnaces,

271.2, and 343.5 for specific pavement heaters and melting devices, respectively.

219, Electric Heating,

600+, for inductive heating, subclasses 678+ for microwave heating, and subclasses 764+ for capacitive dielectric heating.

405, Hydraulic and Earth Engineering,

131, for a general process or apparatus for applying heat to an earth formation.