US PATENT SUBCLASS 405 / 259.3
.~.~ Expandable tube

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


405 /   HD   HYDRAULIC AND EARTH ENGINEERING

258  DF  EARTH TREATMENT OR CONTROL {5}
259.1  DF  .~ Rock or earth bolt or anchor {5}
259.3.~.~ Expandable tube

DEFINITION

Classification: 405/259.3

Expandable tube:

(under subclass 259.1) Subject matter comprising a device having means which permits it to expand after it is inserted into a hole in an earthen formation (e.g., a subterranean roof).