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:
Nov. 27, 1979
Filed:
Oct. 25, 1978
Applicant:
Inventor:
Per A Fahlstrom, Akers Runo, SE;
Assignee:
Boliden Aktiebolag, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208 / ; 423112 ; 423113 ; 4236585 ;
Abstract
Kerogen-containing shale is crushed and comminuted to a fineness sufficient to free kerogen and any sulphides present in said shale. To enable the shale to be finely-divided more readily, the crushed shale is subjected to a leaching treatment prior to final comminution thereof.