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:
Jul. 03, 2018
Filed:
Oct. 11, 2016
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Abstract
To provide a colored glass plate of which the mass ratio of divalent iron as calculated as FeOto total iron as calculated as FeOcan be stably maintained at a high level while amber coloring derived from salt cake (NaSO) is suppressed by reducing the amount of salt cake used as a refining agent, and which has less bubbles regardless of a small amount of total sulfur as calculated as SO. A colored glass plate which is made of alkali-containing silica glass containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the proportion of total sulfur as calculated as SOis less than 0.025%, the proportion of divalent iron as calculated as FeOto total iron as calculated as FeOis at least 45%, the proportion of divalent tin as calculated as SnOto total tin as calculated as SnOis at least 0.1% as represented by mol %, and β-OH is at least 0.15 mm.