Title:
Process for producing viscous oil
United States Patent 3113620

Inventors:
Hemminger, Charles E.
Publication Date:
12/10/1963
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Assignee:
EXXON RESEARCH ENGINEERING CO
Primary Class:
Other Classes:
166/247, 376/275, 166/259
International Classes:
E21B43/263; E21B43/25
US Patent References:
3001775Vertical flow process for in situ retorting of oil shale