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:
Jan. 03, 1989
Filed:
Jun. 26, 1987
Tomoki Mikami, Odawara, JP;
Yukio Tokunaga, Odawara, JP;
Mitsuharu Natsugari, Odawara, JP;
Susumi Omatoi, Odawara, JP;
Shinji Yokota, Odawara, JP;
Kasei Optonix, Ltd., Tokyo, JP;
Abstract
A silicate phosphor comprising manganese as an activator, a trivalent element and a pentavalent element, wherein said trivalent element is at least one element selected from the group consisting of boron and indium, said pentavalent element is at least one element selected from the group consisting of arsenic, antimony and bismuth, the content of the trivalent element is from 1.times.10.sup.-4 to 2.times.10.sup.-2 gram-atom/mol, the content of the pentavalent element is not more than 3.times.10.sup.-3 gram-atom/mol, and the molar ratio of the trivalent element to the pentavalent element (trivalent element/pentavalent element) is at least 1.5.