US PATENT SUBCLASS 219 / 523
.~.~ Housing, casing, or support insertable into material or space to be heated (e.g., immersion type)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
520  DF  .~ With heater-unit housing, casing, or support means (e.g., frame and single sheet) {13}
523.~.~ Housing, casing, or support insertable into material or space to be heated (e.g., immersion type)

DEFINITION

Classification: 219/523

(under subclass 520) Subject matter wherein the particular housing, casing or support means includes particular structural features whereby the housing, casing or support means is adapted to be insertable into and removably retained within a space or material to be heated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

277+, for subsurface (e.g., oil well) heaters.

316+, for immersible liquid heaters.

381+, for immersion type heaters for fluid.

403, for heating unit combined with a housing capable of being inserted into and removed from an oven type enclosure.

415+, for deep well heaters. 437+, for vessel and stand immersion heater.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

545, for bathtub heaters.

5, Beds,

284, for bed heaters.

36, Boots, Shoes, and Leggings,

2.6, for boot heaters.

175, Boring or Penetrating the Earth,

11+, for boring in the earth by directly applying heat particularly subclass 16 which provides for electrically produced heat.

338, Electrical Resistors, 229, for resistors encased in probe type casing.

405, Hydraulic and Earth Engineering,

131, for apparatus for applying heat to the earth.