US PATENT SUBCLASS 239 / 54
.~.~ Rigid solid form media


Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

34  DF  SLOW DIFFUSERS {9}
53  DF  .~ Liquid supply in absorbent or porous media only {2}
54.~.~ Rigid solid form media


DEFINITION

Classification: 239/54

(under subclass 53) Apparatus in which the liquid material retaining element is of the nonfluid, dense, self-supporting type, (e.g., wood, plaster of Paris, etc.).