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:
Oct. 12, 1999
Filed:
Jan. 26, 1998
Naoya Shimizu, Funabashi, JP;
Hiroshi Yamasaki, Funabashi, JP;
Asahi Glass Company Ltd., Tokyo, JP;
Abstract
A glass panel for a cathode ray tube including a substantially rectangular face portion and a skirt portion. Further constituting a side wall of the face portion, a compressive stress layer having a thickness of at least 1/10 of the thickness of the face portion, is formed on each of the inner and outer surfaces of a useful screen area of the face portion, so as to satisfy 0.4.ltoreq..sigma..sub.di /.sigma..sub.ci .ltoreq.1.0, where .sigma..sub.ci is the compressive stress on the inner surface at the center of the useful screen area, and .sigma..sub.di is the compressive stress on the inner surface in the vicinity of ends of diagonal axial lines of the useful screen area.