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. 23, 1999
Filed:
Dec. 12, 1997
Applicant:
Inventors:
Charles Semler, Tuscon, AZ (US);
Thomas Hawisher, Savoy, IL (US);
Herman Pieterse, Tuscon, AZ (US);
Richard Williams, Toronto, CA;
Assignee:
Barrick Gold Corporation, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; C09D / ;
U.S. Cl.
CPC ...
1062861 ; 1062862 ; 1062865 ; 1062868 ; 10628717 ; 10628734 ; 501133 ; 501128 ; 501154 ; 501153 ;
Abstract
A cement composition for use in acidic environments containing an acid resistant particulate aggregate of fused mullite aggregate or other aggregate material, with quartz, and microsilica in combination with a colloidal silica sol binder and being substantially free of Na compounds and K compounds which react in the presence of sulfuric acid to form alkali sulfates in service, thus reducing the durability or the service life.