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. 18, 1985
Filed:
Jul. 15, 1983
Applicant:
Inventors:
Toshio Kuge, Hitachi, JP;
Hiroshi Yokoyama, Hitachi, JP;
Shunsuke Nogita, Hitachi, JP;
Yoichi Nakamura, Kudamatsu, JP;
Katsumi Muroi, Kudamatsu, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10L / ; C10L / ;
U.S. Cl.
CPC ...
44 / ; 44 / ; 44-6 ;
Abstract
This invention relates to a method of converting a low-rank coal to produce a high-rank coal which has reduced hygroscopicity as well as increased heating value and lowered moisture content during and after transport or storage. The invention comprises the steps of heat-treating coal for dehydrating the coal and distilling off tar therefrom, vaporizing the tar, and coating the heat-treated coal surface with the tar vapor, whereby the coal surface is coated uniformly.