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:
Apr. 03, 2018
Filed:
Oct. 19, 2016
Corning Incorporated, Corning, NY (US);
Sezhian Annamalai, Painted Post, NY (US);
Steven Bruce Dawes, Corning, NY (US);
Carlos Alberto Duran, Ottawa, CA;
Kenneth Edward Hrdina, Horseheads, NY (US);
William Rogers Rosch, Corning, NY (US);
Bryan Ray Wheaton, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A doped silica-titania ('DST') glass article that includes a glass article having a glass composition comprising a silica-titania base glass containing titania at 7 to 14 wt. % and a balance of silica, and a dopant selected from the group consisting of (a) F at 0.7 to 1.5 wt. %, (b) BOat 1.5 to 5 wt. %, (c) OH at 1000 to 3000 ppm, and (d) BOat 0.5 to 2.5 wt. % and OH at 100 to 1400 ppm. The glass article has an expansivity slope of less than about 1.3 ppb/Kat 20° C. For DST glass articles doped with F or BO, the OH level can be held to less than 10 ppm, or less than 100 ppm, respectively. In many aspects, the DST glass articles are substantially free of titania in crystalline form.