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. 10, 1998
Filed:
Sep. 15, 1997
Applicant:
Inventors:
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C09C / ;
U.S. Cl.
CPC ...
106482 ; 106491 ; 10628734 ; 423335 ; 523443 ; 523223 ; 523220 ; 524492 ; 524493 ;
Abstract
A silica filler containing from 30 to 90 wt % of particles having a particle size of at least 30 .mu.m, wherein the roundness of the particles having a particle size of at least 30 .mu.m, is from 0.83 to 0.94.