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:
Jun. 28, 1983
Filed:
Sep. 09, 1981
Nobutaka Daiku, Otsu, JP;
Nippon Electric Glass Company, Limited, Otsu, JP;
Abstract
A panel glass of a color cathode ray tube exhibiting a high absorption of X-radiation and an excellent resistance to electron and/or X-ray browning, which is modified by 0.1-5.0 wt % Nd.sub.2 0.sub.3 to provide substantially higher relative light transmission in the green and in the red wavelengths of the visible spectrum and a greater selective light absorption in the yellow region of the spectrum, and which is further modified by 0.0005-0.05 wt % Cr.sub.2 O.sub.3 and 0-2 wt % Pr.sub.6 O.sub.11 to control the chromaticity value of the glass to be nearly equal to that of the light emitted from tricolor phosphor P22 and to suppress the dichroism of the glass for different ambient lights. Ingredients of the glass are as follows: 50-75% SiO.sub.2, 0-5% Al.sub.2 O.sub.3, 0-4% CaO, 0-3% MgO, 0-13% SrO, 0-16% BaO, 0-3% PbO, O-3% ZnO, 0-4% ZrO.sub.2, the sum of SrO+BaO+PbO+ZnO+ZrO.sub.2 being 5-25%, 0-4% Li.sub.2 O, 3-15% Na.sub.2 O, 2-15% K.sub.2 O, the sum of Na.sub.2 O+K.sub.2 O being 5-20%, O-2%, TiO.sub.2, O-3% CeO.sub.2, 0.1-5.0% Nd.sub.2 O.sub.3, 0.0005-0.05% Cr.sub.2 O.sub.3, and 0-2% Pr.sub.6 O.sub.11.