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:
Dec. 29, 2009
Filed:
Apr. 27, 2006
Simone Monika Ritter, Mainz, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Stefanie Hansen, Gensingen, DE;
Schott AG, Mainz, DE;
Abstract
The lead-free, fluorine-free and arsenic-free optical glass, which is useful in mapping, projection, telecommunication, optical communication engineering, and mobile drive and laser technology, has a refractive index of 1.75≦n≦1.83, an Abbe number of 34≦V≦44, and Tg≦560° C. The glass is free of WOand TeOand has a composition in percent by weight based on oxide content of: SiO, 0.5-8; BO, 10-25; ZnO, 10-22; LaO, 23-34; TaO, >15-25; NbO, 0.5-15; AlO, 0-2; and can include optional ingredients, e.g. alkali and/or alkaline-earth oxides. In addition, a sum of BOand ZnO is 33 to 41% by weight and preferably a sum of LaO+TaO+NbOOis greater than 50% by weight.