04008762 is referenced by 273 patents and cites 9 patents.

A method of extracting hydrocarbons in situ from an underground hydrocarbon deposit such as oil shale. A selected part of the deposit is heated by one or more electrical induction coils arranged in a quasi-toroidal configuration to temperatures high enough to drive off hydrocarbon fractions as gases or vapors, which are then collected and utilized in surface operations or recovered for transportation or temporary storage. The deposit may optionally be heated through a coking and cracking stage. Any remaining hydrocarbons may be burned in situ and the combustion gases utilized for energy. Steam may be obtained by injecting water into the heated shale after extraction of the hydrocarbons.

Title
Extraction of hydrocarbons in situ from underground hydrocarbon deposits
Application Number
5/661770
Publication Number
4008762
Application Date
February 26, 1976
Publication Date
February 22, 1977
Inventor
Charles B Fisher
2850 Hill Park Road, Montreal, Quebec
CA
Sidney T Fisher
53 Morrison Ave., Montreal, Quebec
CA
Agent
Barrigar & Oyen
IPC
E21B 43/24
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