US PATENT SUBCLASS 202 / 242
.~.~ Closures

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
239  DF  .~ Elements {10}
242.~.~ Closures {5}
243  DF  .~.~.~> Fluid cooled
*  DD  .~.~.~> Dome ovens {3}
247  DF  .~.~.~> Horizontal retort {2}
250  DF  .~.~.~> Top {1}
252  DF  .~.~.~> Bottom {1}

DEFINITION

Classification: 202/242

Miscellaneous closures for retorts and stills not provided for below.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

201, for enclosing apparatus which may be open on one side, and see "(6) Note" for related fields of search.

48, Gas: Heating and Illuminating,

124, for a retort having a lid.

49, Movable or Removable Closures, appropriate subclasses, for closures of the type provided for and see the search notes in section IV of Class 49 for the loci of closures in other classes.

110, Furnaces,

173+,.

122, Liquid Heaters and Vaporizers,

498, for water-cooled furnace doors.

138, Pipes and Tubular Conduits,

89+, for closures and or plugs for pipes.

220, Receptacles,

200+, for receptacle closures.