US PATENT SUBCLASS 166 / 356
.~.~ Means to provide protective environment for operative access below surface of water

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

Internet Version by PATENTEC © 1999      Terms of Use


166 /   HD   WELLS

335  DF  SUBMERGED WELL {10}
351  DF  .~ Means removably connected to permanent well structure {7}
356.~.~ Means to provide protective environment for operative access below surface of water

DEFINITION

Classification: 166/356

Means to provide protective environment for operative access below surface of water:

(under subclass 351) Process or apparatus including provision of a means to isolate a man from hostile conditions, which means is located beneath the surface of the water.

SEE OR SEARCH CLASS

405, Hydraulic and Earth Engineering,

185+, for diving under water to a well where no well or well manipulation is claimed.