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:
Aug. 31, 2010
Filed:
Mar. 28, 2003
Shigeyoshi Fujiwara, Yokohama, JP;
Mitsuhiro Denda, Yokohama, JP;
Katsuki Ogawa, Yokohama, JP;
Tsuyoshi Miyamoto, Yokohama, JP;
Sadaki Takata, Yokohama, JP;
Shigeyoshi Fujiwara, Yokohama, JP;
Mitsuhiro Denda, Yokohama, JP;
Katsuki Ogawa, Yokohama, JP;
Tsuyoshi Miyamoto, Yokohama, JP;
Sadaki Takata, Yokohama, JP;
Shiseido Co., Ltd., Tokyo, JP;
Abstract
A first subject of the present invention is an insoluble powder characterized in that a zeta-potential is a negative value. It is preferable that barium sulfate is a main ingredient in the insoluble powder. It is preferable that an average primary particle diameter is 3 to 100 μm, and an aspect ratio is 3 to 250 in the insoluble powder. It is preferable that the insoluble powder is a metal-doped barium sulfate powder obtained by reacting a barium ion and a sulfate ion in the presence of a metal ion. It is preferable that the metal ion is one or more selected from the group consisting of a lithium ion, a sodium ion and a zinc ion in the insoluble powder. A second subject of the present invention is a skin barrier function recovering powder, or a skin roughening preventing and improving powder, which comprises the aforementioned powder. A third subject of the present invention is a skin external composition characterized in that a content of the aforementioned powder is 1 to 40% by weight.