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. 25, 2001
Filed:
May. 08, 2000
Applicant:
Inventors:
Assignee:
Schott Glas, , DE;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/066 ; C03C 3/068 ;
U.S. Cl.
CPC ...
C03C 3/066 ; C03C 3/068 ;
Abstract
The invention can relate to essentially lead-free optical glasses having a refractive index n,of from about 1.65 to about 1.87 and an Abbe number &ngr;,of from about 27 to about 43 and a composition (in % by weight, based on oxide) of SiO,about 10-about 25, B,O,>about 10-about 25, Na,O about 2.5-about 10, K,O 0-about 3, CaO about 0.5-about 5, BaO about 15-about 30, ZnO about 5-about 15, TiO,about 6-about 15, ZrO,about 0.5-about 8, Y,O,about 0.1-about 2, La,O,about 0.5-about 8, Nb,O,about 6-about 12, with La,O,+Nb,O,≦about 17,Ta,O,0-about 1, and Gd,O,0-about 1.