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. 10, 1987
Filed:
Apr. 04, 1986
Applicant:
Inventor:
John J Simmons, Bismarck, ND (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10L / ; C10L / ;
U.S. Cl.
CPC ...
44 51 ; 44 / ; 44-6 ; 44 33 ;
Abstract
Low rank coals including lignite, brown and sub-bituminous coals, and peat containing unacceptably high quantities of water are dried and enriched in BTU content. The mine low rank coal is crushed to between about one-half inch and three inches in diameter and immersed in hot oil to dry the coal. The coal is then screened or centrifuged to remove excess oil and the resulted oil impregnated dried coal has a much higher BTU content. The dried high BTU low rank coal may be then powdered and utilized to form a coal-water liquid fuel.