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:
Apr. 12, 2011
Filed:
Feb. 16, 2006
Applicant:
Eiji Oyaizu, Yokohama, JP;
Inventor:
Eiji Oyaizu, Yokohama, JP;
Assignees:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Yokohama-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G21F 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A radiation shielding sheet formed by filling a shielding material into an organic polymer material. The shielding material is an oxide powder containing at least one element selected from the group consisting of lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu) and gadolinium (Gd). The oxide powder has an average grain size of 1 to 20 μm, and a volumetric ratio of the shielding material filled in the radiation shielding sheet is 40 to 80 vol. %.