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:
Oct. 26, 2010
Filed:
Mar. 19, 2007
Shuji Sasaki, Omuta, JP;
Norihisa Nakashima, Omuta, JP;
Shuji Sasaki, Omuta, JP;
Norihisa Nakashima, Omuta, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention herein provides silica powder which can be incorporated into a sealing material at a high content to thus give a sealing material having excellent moldability. The silica powder at least has, in the volume-based frequency distribution of particle size as determined by the laser diffraction-scattering technique, a maximum frequency value for a mode peakpresent in a particle size range extending from 1 to 4 μm and a maximum frequency value for a mode peakpresent in a particle size range extending from 15 to 55 μm, wherein the maximum frequency value for the mode peakis greater than that for the mode peak, the mode peakhas a shoulder, and the content of particles whose particle size ranges from 15 to 55 μm is larger than that of particles whose particle size ranges from 1 to 4 μm.