The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1979
Filed:
Jan. 16, 1978
Applicant:
Inventor:
Robert S Burton, III, Grand Junction, CO (US);
Assignee:
Occidental Oil Shale, Inc., Grand Junction, CO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299-1 ; 166251 ; 299-2 ; 299 13 ;
Abstract
The locus of a processing zone advancing through a fragmented permeable mass of particles in an in situ oil shale retort in a subterranean formation containing oil shale and which generates an effluent fluid is determined by placing an indicator source for providing an indicator, and monitoring effluent fluid from the processing zone for presence of indicator. The indicator source provides indicator at a predetermind temperature.