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:
Mar. 16, 2010
Filed:
Apr. 06, 2006
Akira Okada, Sakaide, JP;
Xing Dong Wang, Sakaide, JP;
Takatoshi Sato, Sakaide, JP;
Kyowa Chemical Industry Co., Ltd., Kagawa, JP;
Abstract
Alunite type compound particles represented by the following general formula (I) and having a specific value of D/Dwhen Dis the particle diameter of particles which account for 25% of the total and Dis the particle diameter of particles which account for 75% of the total in the cumulative particle size distribution curve measured by a laser diffraction method:M[AlM'](SO)(OH)HO  (I)wherein M is at least one cation selected from the group consisting of Na, K, NHand HO, M′ is at least one cation selected from the group consisting of Cu, Zn, Ni, Sn, Zrand Ti, and a, m, x, y and z satisfy 0.8≦a≦1.35, 0≦m≦5, 0≦x≦0.4, 1.7≦y≦2.5, and 4≦z≦7, respectively. The above particles of the present invention have a small average particle diameter, are spherical, disk-like or hexagonal and have an extremely narrow particle size distribution.