US PATENT SUBCLASS 169 / 69
.~ For oil or gas well
Current as of: June, 1999
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DEFINITION
Classification: 169/69
(under subclass 54) Apparatus for extinguishing or preventing fires at the outlet of a subterranean source of an inflammable fluid.
SEE OR SEARCH CLASS
166, Wells,
75.11+, especially subclasses 79.1 and 90.1 for well apparatus combined with fire extinguishers where the fire extinguishing feature goes no further than a mere cap or head, means for diverting flow from the well or means for inserting a fluid into the well, or where more of the well is claimed than cooperates with the fire extinguishing means.
