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:
May. 12, 1998
Filed:
Dec. 11, 1996
Danuta Grabowski, Taunusstein, DE;
Uwe Kolberg, Mainz, DE;
Alwin Weitzel, Mainz, DE;
Magdalena Winkler-Trudewig, Mainz, DE;
Schott Glaswerke, Mainz, DE;
Abstract
The invention relates to a copper(II) oxide-containing aluminophosphate glass having good chemical resistance, very good devitrification stability, high transmission at wavelengths in the range from 350 to 550 nm and a refractive index n.sub.d of from 1.52 to 1.54. The glass has the following composition (in % by weight, based on oxide): Al.sub.2 O.sub.3 4-9; P.sub.2 O.sub.5 67-75; BaO 0.5-6; CaO 0.1-1; MgO 0-4; SrO 0-1; ZnO 0.2-1; .SIGMA.BaO+CaO+MgO+SrO+ZnO 3.5-7; Na.sub.2 O 1.5-5; K.sub.2 O 2.5-3.5; Li.sub.2 O 0.5-5; .SIGMA.Na.sub.2 O+K.sub.2 O+Li.sub.2 O 5-13; SiO.sub.2 0-1; B.sub.2 O.sub.3 1-2.5; AS.sub.2 O.sub.3 0.1-0.5; Cl.sup.- 0-0.3; F.sup.- O-1.3; CeO.sub.2 0.2-0.4; CuO 1-6; with K.sub.G =.SIGMA.Al.sub.2 O.sub.3 +SiO.sub.2 +CeO.sub.2 /.SIGMA.P.sub.2 O.sub.5 +B.sub.2 O.sub.3 0.06-0.125.