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


Current as of: June, 1999
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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.