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:
Aug. 19, 2003
Filed:
Aug. 21, 2002
Applicant:
Inventors:
Ken Ishitobi, Shiojiri, JP;
Masahiro Nozaki, Nagoya, JP;
Tadanori Nagao, Nagoya, JP;
Yoshiki Hayashi, Nagoya, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09G 1/02 ; C09G 1/04 ;
U.S. Cl.
CPC ...
C09G 1/02 ; C09G 1/04 ;
Abstract
To provide a polishing composition which enables maintenance of excellent properties and high quality of the surface of a hard disk without lowering polishing rate during polishing of the surface, and which can provide a polished surface in which the amount of dub-off is considerably reduced as compared with that of a conventional level, a polishing composition containing water, a polishing material (particularly alumina), a polishing accelerator, and at least one of hydroxypropyl cellulose and hydroxyalkyl alkyl cellulose is provided.