(under the class definition) Subject matter relating to inclosures surrounding a boiler of a miscellaneous nature not specially provided for in other subclasses in this or any other main class.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings), appropriate subclasses for masonry or concrete constructions.
106, Compositions: Coating or Plastic, particularly
40, 41, 75, 86+, and 122 for insulating compositions.
110, Furnaces,
336+, for wall structures forming part of the furnace which covers the boiler. 126, Stoves and Furnaces,
273.5, and 375 for stoves and furnaces with heat accumulator.
138, Pipes and Tubular Conduits, particularly
32, 35 for thawing and steam protection of pipes.
220, Receptacles, for casing structure of general utility.
252, Compositions,
62, for heat insulating compositions.
428, Stock Material or Miscellaneous Articles, appropriate subclasses, for a stock material product in the form of a single or plural layer web or sheet, where either the material or the structure of the product may inherently influence the loss or gain of heat; see particularly
304+, 426+, 457+, and 920+ (a cross-reference art collection).
