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:
Sep. 24, 2002
Filed:
Jan. 31, 2001
Applicant:
Inventors:
Assignee:
Kao Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 3/14 ; C09G 1/02 ; C09G 1/04 ; B24B 1/00 ;
U.S. Cl.
CPC ...
C09K 3/14 ; C09G 1/02 ; C09G 1/04 ; B24B 1/00 ;
Abstract
A polishing composition comprising silica particles, water, and Fe salt and/or Al salt of a polyaminocarboxylic acid; a polishing process comprising applying the polishing composition; a process for manufacturing a magnetic disk substrate, comprising the step of polishing a substrate with the polishing composition; a magnetic disk substrate manufactured by applying the polishing composition.