Apparatus for applying pressure to oil sands
United States Patent 1861332

Inventors:
Waitz, Charles A.
Publication Date:
05/31/1932
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Assignee:
Waitz, Charles A.
Primary Class:
166/185
Other Classes:
166/67, 166/308.100, 166/189, 166/222, 166/115, 277/339, 166/305.100, 166/269, 166/191
International Classes:
E21B33/124; E21B43/16; E21B33/12