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. 02, 1989
Filed:
Apr. 01, 1988
Applicant:
Inventor:
Johannus G Verlijsdonk, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
313486 ; 2523 / ; 428690 ; 313487 ;
Abstract
Luminescent Eu.sup.2+ activated barium-hexa-aluminate mainly having the crystal structure of .beta.'-alumina and being defined by the formula (x-p)BaO.pEuO.(6-0.67x)Al.sub.2 O.sub.3 in which 0.90.ltoreq.x.ltoreq.1.22 and 0.005.ltoreq.p.ltoreq.0.25 and in which 1 to 20 mol % of the BaO is replaced by at least one of the oxides CaO and 0.67Li=.sub.2 O, exhibits improved performance as a blue line emitter.