US PATENT SUBCLASS 588 / 259
.~ Secondary containment

Current as of: June, 1999
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588 /   HD   HAZARDOUS OR TOXIC WASTE DESTRUCTION OR CONTAINMENT

249  DF  CONTAINMENT {6}
259.~ Secondary containment

DEFINITION

Classification: 588/259

Secondary containment:

(under subclass 249) Processes wherein more than one form of containment is used (i.e., one form of containment around another form of containment).

SEE OR SEARCH CLASS

405, Hydraulic and Earth Engineering,

128+, for waste containment in soil and subclasses 266+ for cementing.