(under subclass 200) Subject matter wherein said instrument controls a means for cleaning said heat transfer apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
95, for heat exchange apparatus having cleaning means.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
3.5+, for cleaning means having means to pass a solid cleaning agent and a fluid carrier through tubular work; subclasses 301+ for installed cleaners involving no modification of the heat exchanger; subclasses 104.03+ for pipe and tube cleaning implements.
134, Cleaning and Liquid Contact With Solids, appropriate subclasses for cleaning apparatus of more general utility. CROSS-REFERENCE ART COLLECTIONS
