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. 07, 2002
Filed:
Dec. 17, 1999
Applicant:
Inventors:
Alok Mani Srivastava, Niskayuna, NY (US);
Holly Ann Comanzo, Schenectady, NY (US);
Laurence Bigio, University Heights, OH (US);
William Winder Beers, Chesterland, OH (US);
Thomas Frederick Soules, Richmond Heights, OH (US);
Emoke Abasari, Budapest, HU;
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 6/104 ;
U.S. Cl.
CPC ...
H01J 6/104 ;
Abstract
There is provided an emissive mixture for cathodes of fluorescent lamps comprising a ceramic material having a formula (A Ca ) (Ta W ) O , where A is barium or a combination of barium and strontium, 0≦x<0.5, 0≦y<1, and one of x or y is greater than zero. The ratio of lamp efficacy to number of lamp starts may be improved by optimizing the amount of Ca and W present in the ceramic material.