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. 02, 2013
Filed:
Dec. 02, 2010
Applicants:
Simone Ritter, Mainz, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Stefanie Hansen, Gensingen, DE;
Inventors:
Assignee:
Schott AG, Mainz, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/155 (2006.01); C03C 3/15 (2006.01); C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
Abstract
The optical glass has a refractive index nof 1.945≦n≦1.97, an Abbe number νof 33≦ν≦36, and a composition with the following components in amounts expressed in % of their cations, with respect to the total number of cations in the composition: B, 35-46; La, 25-35; Ta, 6-14; W, 6-13; Zr, 1-7; Gd, 0-5; Nb, 0-4; Y, 0-4; Ba, 0-2; Σ alkaline earth metal cations, 0-2, Σ La+Ta+W+Zr+Gd+Nb+Y≧50; and at least one fining agent, 0-0.3. Also a ratio of Bto Lais 1.1 to 1.6 and a ratio of Bto Σ Si+Bis ≧0.5. The glass is free of lead, arsenic, Ti, Th, Zn, F, and Hf.