US PATENT SUBCLASS 52 / 396.03
.~.~ Including a collapsible cell (e.g., hollow), bight, or accordion-shaped portion

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

393  DF  RELATIVELY YIELDABLE PREFORMED SEPARATOR (I.E., EXPANSION JOINT) {6}
396.02  DF  .~ Separator inserted prior to or during pouring of two adjacent concrete sections {1}
396.03.~.~ Including a collapsible cell (e.g., hollow), bight, or accordion-shaped portion

DEFINITION

Classification: 52/396.03

Including a collapsible-cell (e.g., hollow), bight, or

accordion-shaped portion:

(under subclass 396.02) Inserted separator which contains a yieldable portion that is (1) an air enclosing compartment, (2) a web of material having a bend for slack, or (3) pleated.