(under subclass 285) A process involving the use of a significant or substantial amount of heat.
(1) Note. The use of heat in preparing a cementing, plugging or consolidating material above ground is not included. See subclasses 292+ for such a process.
(2) Note. The presence of heat must be positively stated in a claim for classification of a patent in this subclass. An inference that heat is present, as because of a chemical reaction, is not sufficient for classification in this subclass.
(3) Note. Merely permitting the natural heat present in the well to act on cementing, plugging, or consolidating material is not included. See subclass 295 for methods involving the use of resins set by the natural heat of the well.
SEE OR SEARCH CLASS
405, Hydraulic and Earth Engineering, 234, for processes or apparatus for casting a piling in situ of hardenable fluent material including heating or cooling.
