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:
Jun. 24, 1986
Filed:
Jan. 19, 1983
Applicant:
Inventors:
William F Wolff, Park Forest, IL (US);
James S Patterson, Naperville, IL (US);
Assignee:
Standard Oil Company (Indiana), Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ; C10C / ; C10C / ;
U.S. Cl.
CPC ...
208390 ; 208 45 ;
Abstract
A process for extracting bitumen from tar sands comprises a two-stage extraction wherein both specific and non-specific solvents are used to obtain a bitumen product low in fines and asphaltenes.