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. 25, 2003
Filed:
Nov. 12, 2002
Applicant:
Inventors:
Kazuhiro Nakayama, Fukuoka-ken, JP;
Akira Nakashima, Fukuoka-ken, JP;
Michio Komatsu, Fukuoka-ken, JP;
Assignee:
Catalysts & Chemicals Industries Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/312 ; C09K 3/14 ; C09G 1/02 ;
U.S. Cl.
CPC ...
C01B 3/312 ; C09K 3/14 ; C09G 1/02 ;
Abstract
Silica particles for polishing have a three-dimensional polycondensation structure with an average particle diameter in a range from 5 to 300 nm. The silica particles have residual alkoxy groups therein and a carbon content in a range from 0.5 to 5 weight % retained in the residual alkoxy groups.