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. 05, 2015
Filed:
Jul. 29, 2011
Masataka Fujinaga, Yamaguchi, JP;
Takayuki Ueda, Yamaguchi, JP;
Takuma Sakai, Yamaguchi, JP;
Shinsuke Jida, Yamaguchi, JP;
Masataka Fujinaga, Yamaguchi, JP;
Takayuki Ueda, Yamaguchi, JP;
Takuma Sakai, Yamaguchi, JP;
Shinsuke Jida, Yamaguchi, JP;
UBE Industries, Ltd., , JP;
Abstract
Provided are a crystalline silicon nitride powder for a siliconitride phosphors, which is used as a starting material for producing a siliconitride phosphor containing a silicon element and a nitrogen element but no oxygen element as a constitutent element, an oxygen content of the silicon nitride phosphor being 0.2-0.8 wt %; a CaAlSiNphosphor, an SrSiNphosphor, an (Sr, Ca)AlSiNphosphor and an LaSiNphosphor, each using the silicon nitride powder; and a method for producing the phosphors.