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:
Jan. 08, 2019
Filed:
Oct. 20, 2010
Jiro Iriguchi, Himeji, JP;
Yasuhiro Yamamoto, Himeji, JP;
Shuji Shimizu, Suita, JP;
Yuji Ono, Himeji, JP;
Jiro Iriguchi, Himeji, JP;
Yasuhiro Yamamoto, Himeji, JP;
Shuji Shimizu, Suita, JP;
Yuji Ono, Himeji, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
Provided are amorphous silica particles for application to industrial fields where there are increasing desires for high purity and colorlessness. The amorphous silica particles are produced through the steps of hydrolysis of an alkoxide, vacuum drying, and firing. The amorphous silica particles have been reduced in coloration and in Fe content, which is causative of coloration of the silica, and can meet the desires. The amorphous silica is characterized by having an Fe content of 20 ppm or less.