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. 18, 1993
Filed:
Oct. 24, 1986
Applicant:
Inventors:
Assignee:
Schott Glaswerke, Mainz, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
501 69 ; 501 64 ; 501 70 ; 501 71 ;
Abstract
A transparent, colored glass ceramic containing high-quartz solid solution crystals, whose transmission in the IR range between 800 nm and 2.6 microns can be variably adjusted, and which has the composition (in weight percent) of 62-68% SiO.sub.2, 19.5-22.5% Al.sub.2 O.sub.3, 3.0-4.0 Li.sub.2 O, 1.5-3.5% BaO, 0.5-2.5% ZnO and 1.5-5.0% TiO.sub.2 in addition to other possible oxides, which are present in small quantities, the color being produced by MnO.sub.2, Fe.sub.2 O.sub.3, CoO, NiO, V.sub.2 O.sub.5 and Cr.sub.2 O.sub.3. This glass ceramic is transformed from the starting glass by a heat treatment between 680.degree. C. and 920.degree. C.