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:
Apr. 14, 1992
Filed:
Jul. 25, 1989
Applicant:
Inventors:
Werner Behr, Alfeld/L., DE;
Reinhard Kassner, Alfeld/L., DE;
Assignee:
Deutsche Spezialglas Aktiengesellschaft, Delligsen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 13 ; 501 56 ; 501 77 ; 501903 ;
Abstract
A highly refractive, low-density phototropic glass in which the carriers of phototropy are precipitates containing silver, halogens and copper oxide, and which has a density equal to or less than 3.0 g/cm.sup.3, a refractive index equal to or greater than 1.60 and an Abbe number equal to or greater than 40, consisting essentially of, in % by weight on an oxide basis: