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:
Sep. 11, 2012
Filed:
Dec. 22, 2009
Carlos Duran, Ottawa, CA;
Richard Michael Fiacco, Corning, NY (US);
Kenneth Edward Hrdina, Horseheads, NY (US);
Daniel Raymond Sempolinski, Painted Post, NY (US);
Carlos Duran, Ottawa, CA;
Richard Michael Fiacco, Corning, NY (US);
Kenneth Edward Hrdina, Horseheads, NY (US);
Daniel Raymond Sempolinski, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A fused silica glass article having a low absolute refractive index and low concentrations of hydroxyl groups, halogens, and metal having a low absolute refractive index. The glass article contains less than about 10 ppm protium-containing and deuterium-containing hydroxyl groups by weight and less than about 20 ppm halogens by weight. The silica glass article also has an absolute refractive index (ARI) less than or equal to 1.560820. In one embodiment, the ARI of the fused silica article is achieved by lowering the fictive temperature of the fused silica. A method of lowering the fictive temperature is also described.