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:
Nov. 20, 2007
Filed:
Feb. 28, 2005
Applicants:
Silke Wolff, Hueckeswagen, DE;
Karl Mennemann, Taunusstein, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Inventors:
Assignee:
Schott AG, Mainz, DE;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/066 (2006.01); C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to lead and arsenic free optical glasses, used for the application areas imaging, digital projection, photolithography, laser technology, wafer/chip technology as well as telecommunication, optical communications engineering, optics, illumination and in the automotive sector. The glasses have a refraction power of from 1.73≦n≦1.82 and an Abbé value of 43≦v≦53 with good chemical consistency and excellent crystallisation stability with the following composition (in weight-%):