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. 30, 2013
Filed:
Jun. 21, 2010
Burkhard Speit, Mainz, DE;
Silke Wolff, Hueckeswagen, DE;
Thorsten Doehring, Mainz, DE;
Schott AG, Mainz, DE;
Abstract
The space glasses have a composition, in wt. % based on oxide content, including SiO, 12-45; BO, 0-4; AlO, 0-4; TiO, 0-5; PbO, 50-82; NaO, 0-4; KO, 0-8; and at least 0.1 wt. % of a total amount of at least three doping agents selected from CeO, MoO, BiO, WO, AgO, SnO, SbOand AsO. Light-weight and space-saving optical systems for outer space applications can be made with these space glasses, which have high UV- and VIS-transmittance and high transmittance stability, because of their high radiation resistance based on their dopant content. A preferred process for making the space glass includes melting the above-stated oxide ingredients in a quartz crucible at 1050° C. to 1200° C. to form a melt and refining the melt at 1230° C. to 1350° C.