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:
Jan. 06, 2004
Filed:
Aug. 20, 2002
Applicant:
Inventors:
Ru-Shi Liu, Hsin-Chu Hsien, TW;
Sung-Chun Chang, Taipei, TW;
Assignee:
Everlight USA, Inc., Pineville, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 3/14 ;
U.S. Cl.
CPC ...
C09K 3/14 ;
Abstract
An SiO /Al O composite abrasive is disclosed, which has positive surface charges when dispersed in an alkaline water solution. This SiO /Al O composite abrasive includes an Al O core and SiO coated thereon. The abrasive of the present invention is suitable for polishing metal, compact disks, optical lenses, and semiconductors etc in a high-pH environment. A method for producing the SiO /Al O composite abrasive is also disclosed in the present invention.