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:
May. 29, 2012
Filed:
Nov. 29, 2007
Kazuhiro Nakayama, Kitakyushu, JP;
Mami Tokunaga, Kitakyushu, JP;
Akira Nakashima, Kitakyushu, JP;
Kazuaki Inoue, Kitakyushu, JP;
Osamu Yoshida, Kitakyushu, JP;
Yoshinori Wakamiya, Kitakyushu, JP;
Hiroyasu Nishida, Kitakyushu, JP;
Kazuhiro Nakayama, Kitakyushu, JP;
Mami Tokunaga, Kitakyushu, JP;
Akira Nakashima, Kitakyushu, JP;
Kazuaki Inoue, Kitakyushu, JP;
Osamu Yoshida, Kitakyushu, JP;
Yoshinori Wakamiya, Kitakyushu, JP;
Hiroyasu Nishida, Kitakyushu, JP;
JGC Catalysts and Chemicals Ltd., Kawasaki-Shi, JP;
Abstract
The present invention provides a sol of spinous inorganic oxide particles not containing coarse particles, in which particles having extremely homogeneous particles are dispersed in a solvent. An acidic silicic acid is added to a dispersion liquid of core particles to grow core particles, and then again the acidic silicic acid is added at the addition rate 1.2 to 1.8 higher than that in the previous step to prepare a sol of spinous inorganic oxide particles. Then the sol is subjected to centrifugation to remove coarse particles having the diameter of 800 nm or more, thus spinous inorganic oxide particles having peculiar form such as a spinous one being obtained.