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:
Sep. 07, 1982
Filed:
Dec. 24, 1980
Applicant:
Inventor:
Robert P Guerre, Seabrook, TX (US);
Assignee:
Exxon Research & Engineering Co., Florham Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03B / ;
U.S. Cl.
CPC ...
209-2 ; 209 17 ; 2091725 ; 208 / ; 208 / ; 241 24 ; 241 77 ;
Abstract
A size fraction of oil shale is upgraded by separating the shale into a first low density fraction containing particles relatively rich in kerogen and a first high density fraction containing particles relatively lean in kerogen, crushing the first low density fraction to produce smaller particles, separating the smaller particles into a second low density fraction and a second high density fraction and recovering the second low density fraction as high grade oil shale rich in kerogen.