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:
Apr. 17, 2001
Filed:
Apr. 14, 1999
Applicant:
Inventor:
David A. Tammaro, Painted Post, NY (US);
Assignee:
Corning Incorporated, Corning, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/105 ; H01J 2/986 ;
U.S. Cl.
CPC ...
C03C 3/105 ; H01J 2/986 ;
Abstract
A cathode ray tube with an improved tubular glass neck member having a softening point in the range of 640-650° C., an annealing temperature in the range of 460-472° C., a strain point in the range of 420-425° C., a coefficient of thermal expansion in the range of 94-97×10,/° C., and a linear x-ray absorption value of at least 100 cm,and a composition, as calculated in weight % on an oxide basis, consisting essentially of 46.5-49.5% SiO,, 1.5-2% Al,O,, 0.5-1.5% Na,O, 10-12% K,O, 2-3% SrO, 1-1.8% BaO, 32-34% PbO, 1-1.5% ZnO and a fining agent.