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:
Jan. 30, 1990
Filed:
Jan. 21, 1988
Kouichi Suzuki, Osaka, JP;
Kazuo Shibaoka, Osaka, JP;
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
The instant invention relates to soda-lime-silica glass articles, having a surface which is resistant to coloring by electron rays which is suitable for use as the glass panel of a cathode ray tube. Said glass article being produced by a float process, and said surface having the sodium ions exchanged with lithium and at least one of potassium, rubidium, and cesium ions. In another aspect of the invention a soda-lime-silica glass containing 0.2-1.5% by weight of Li.sub.2 O having the sodium ions in at least one surface exchanged with potassiums is produced, such that the ratio of Na.sub.2 O/(Na.sub.2 O+K.sub.2 O) is 0.2-0.6 for a depth of 0.5 microns from said surface.