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:
Mar. 20, 1984
Filed:
Feb. 16, 1983
Applicant:
Inventors:
Assignee:
Dai-Ichi Kogyo Seiyaku Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10L / ; C10L / ;
U.S. Cl.
CPC ...
44 / ; 44 1 / ; 44 51 ;
Abstract
Natural coal containing inorganic impurities may be deashed by the selective flocculation process using a novel flocculant which is a water-soluble or water-dispersible copolymer having a molecular weight from about 100,000 to about 30,000,000 comprising a hydrophilic monomeric unit having a solubility in water greater than 15% by weight at 20.degree. C. and a hydrophobic monomeric unit having a solubility in water less than 10% by weight at 20.degree. C. in proportions of 99:1 to 20:80% by weight.