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:
Mar. 28, 2006
Filed:
Sep. 11, 2001
Georg Friedrich Gaertner, Aachen, DE;
David Steven Barratt, Rossendale, GB;
Christopher James Goodhand, Blackburn, GB;
Detlef Raasch, Aachen, DE;
Petrus Arthur Marie Van Der Heide, Clitheroe, GB;
Timothy John Lee, Settle, GB;
Georg Friedrich Gaertner, Aachen, DE;
David Steven Barratt, Rossendale, GB;
Christopher James Goodhand, Blackburn, GB;
Detlef Raasch, Aachen, DE;
Petrus Arthur Marie Van Der Heide, Clitheroe, GB;
Timothy John Lee, Settle, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a cathode ray tube equipped with at least one oxide cathode comprising a cathode carrier having a cathode base of a first cathode metal and having a covering layer of ultrafine metal particles that contain nickel. The oxide cathode also comprises a cathode coating of an electron-emitting material containing a particle-particle composite of oxide particles and metal particles. The oxide particles comprise an oxide selected among the oxides of scandium, yttrium and the lanthanoids cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and an alkaline earth oxide selected among the group consisting of the oxides of calcium, strontium and barium, and the metal particles contain a second cathode material selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt. The invention also relates to an oxide cathode.