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:
Jun. 12, 2012
Filed:
Jun. 22, 2009
Applicants:
Makoto Ida, Tokyo, JP;
Fumio Ishida, Tokyo, JP;
Yoshiaki Teraishi, Tokyo, JP;
Takuya Yamashita, Toyama, JP;
Inventors:
Makoto Ida, Tokyo, JP;
Fumio Ishida, Tokyo, JP;
Yoshiaki Teraishi, Tokyo, JP;
Takuya Yamashita, Toyama, JP;
Assignee:
Nippon Carbide Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/195 (2006.01);
U.S. Cl.
CPC ...
Abstract
An alumina ceramic contains a BaAlSiOphase. The alumina ceramic has high reflectivity and is useful as a reflecting material for a light emitting element. The alumina ceramic which exhibits an X-ray diffraction pattern having a ratio of the peak intensity at 2θ=43.3° to that at 22.5° of 0.5 to 2.5 has particularly high reflectivity. The alumina ceramic shows high reflectivity particularly at wavelengths ranging from 300 to 400 nm.