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:
May. 20, 1980
Filed:
Apr. 03, 1978
Applicant:
Inventors:
Norman L Carr, Allison Park, PA (US);
Edgar L McGinnis, Gibsonia, PA (US);
Assignee:
Gulf Research & Development Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 71 ; 210 75 ;
Abstract
The rate of separation of suspended mineral particles from a coal liquid is increased by adding a calcium salt, such as calcium carbonate, to the coal liquid. The increase in the separation rate is achieved even though the suspended coal mineral particles naturally contain a calcium salt.