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:
Mar. 23, 2004
Applicants:
Silke Wolff, Hueckeswagen, DE;
Ute Woelfel, Mainz, DE;
Ulrich Siepe, Wiesbaden, DE;
Inventors:
Assignee:
Schott AG, Mainz, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/155 (2006.01); C03C 3/253 (2006.01); C03C 3/066 (2006.01); B32B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The optical glass has an index of refraction (n) greater than or equal to 1.70, an Abbé number (ν) greater than or equal to 35 and a density (ρ) less than or equal to 4.5 g/cm. Optical elements made with this optical glass are especially desirable in optical data transfer applications, particularly in read-write devices with movable read-write heads. The glass compositions required to make optical glass with these properties are described.