US PATENT SUBCLASS 405 / 257
.~.~.~ With form or casing

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

229  DF  FOUNDATION {2}
231  DF  .~ Columnar structure (e.g., pier, pile) {7}
256  DF  .~.~ Concrete {1}
257.~.~.~ With form or casing

DEFINITION

Classification: 405/257

With form or casing:

(under subclass 256) Elongated member which, when installed in the earth, comprises an elongated concrete body substantially enclosed by a distinct outer shell, which may also be concrete.

SEE OR SEARCH THIS CLASS, SUBCLASS:

233+, for methods and apparatus for forming concrete piles in situ.