US PATENT SUBCLASS 285 / 290.3
.~.~ Interlocked with pipe end

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

285.1  DF  MOLDED JOINT {11}
290.1  DF  .~ Composite pipe (ends) {3}
290.3.~.~ Interlocked with pipe end {1}
290.4  DF  .~.~.~> Having additional holding means

DEFINITION

Classification: 285/290.3

Interlocked with pipe end:

(under subclass 290.1) Subject matter wherein a reinforcing rod in one section of the conduit is hooked into the end of another section of conduit.