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:
Feb. 21, 1978
Filed:
Jun. 14, 1976
Applicant:
Inventors:
William W Piper, Scotia, NY (US);
Jerome S Prener, Schenectady, NY (US);
George R Gillooly, Cleveland Heights, OH (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; C09K / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
313497 ; 2523 / ;
Abstract
An improved cool-white fluorescent lamp utilizes a particular two-component phosphor combination exhibiting a narrow 'blue' emission spectrum and a broad 'yellow' emission spectrum to achieve improved luminous efficacy. In one preferred embodiment, the combination is a blended mixture of europium activated strontium chlorapatite with manganese and antimony coactivated calcium fluorapatite phosphors.