Title:
Underground storage system
United States Patent 2796739

Inventors:
Meade, Leonard P.
Downs Jr., George F.
Publication Date:
06/25/1957
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Assignee:
PHILLIPS PETROLEUM CO
Primary Class:
62/48.200
Other Classes:
62/260, 62/53.100, 405/56, 62/115
International Classes:
E21D1/12; F17C3/00; E21D1/00
US Patent References:
2550886System for conserving liquefied gases
2645093Apparatus for congelation of ground
2659209Underground liquid storage facility and the method of selecting and preparing the same
Foreign References:
DE322136C