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. 01, 2005
Filed:
May. 30, 2003
Shankar Madras Venugopal, Karnataka, IN;
Alok M. Srivastava, Niskayuna, NY (US);
Holly Ann Comanzo, Niskayuna, NY (US);
Vikas Midha, Clifton Park, NY (US);
William Winder Beers, Chesterland, OH (US);
Gopi Chandran Ramachandran, Karnataka, IN;
Mukunda Srinivas Adyam, Karnataka, IN;
Shankar Madras Venugopal, Karnataka, IN;
Alok M. Srivastava, Niskayuna, NY (US);
Holly Ann Comanzo, Niskayuna, NY (US);
Vikas Midha, Clifton Park, NY (US);
William Winder Beers, Chesterland, OH (US);
Gopi Chandran Ramachandran, Karnataka, IN;
Mukunda Srinivas Adyam, Karnataka, IN;
General Electric Company, Niskayuna, NY (US);
Abstract
An electron emissive composition comprises a barium tantalate composition of the formula (Ba, Ca, Sr, D)(Ta, W, E, F, G, Ca)Owhere δ is an amount of about 0 to about −3; and wherein D is either an alkali earth metal ion or an alkaline earth ion; E, F, and G, are alkaline earth ions and/or transition metal ion; x is an amount of up to about 0.7; y is an amount of up to about 1; p and q are amounts of up to about 0.3; and t is an amount of about 0.05 to about 0.10, u is an amount of up to about 0.5, v is an amount of up to about 0.5 and w is an amount of up to about 0.25. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition with a binder; and sintering the barium tantalate composition with the binder at a temperature of about 1000° C. to about 1700° C.