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. 17, 1987
Filed:
Jun. 04, 1984
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313468 ; 313467 ;
Abstract
A color picture tube fitted with a phosphor screen formed of a green-emitting phosphor prepared from copper and aluminum-activated zinc sulfide, a red-emitting phosphor prepared from europium-activated yttrium oxysulfide, and a blue-emitting phosphor prepared from silver-activated zinc sulfide, and wherein the copper concentration ranges between 0.01 and 0.03% by weight and the europium concentration ranges between 5.1 and 6.1% by weight.