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:
Oct. 20, 2009
Filed:
Feb. 03, 2006
Applicants:
Silke Wolff, Hueckeswagen, DE;
Stefanie Hansen, Gensingen, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Inventors:
Assignee:
Schott AG, Mainz, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/093 (2006.01); C03C 3/091 (2006.01); C03C 3/066 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to lead and arsenic free optical hard crown glasses with a low transformation temperature (Tg≦520° C.), characterized by their optical range with a refractive index of 1.57≦n≦1.61 and an Abbe number of 56≦ν≦63. The glasses have the following composition (in wt %): Refiners can be added, provided that they do not comprise arsenic.