Patents by Inventor Donna Guesto-Barnak

Donna Guesto-Barnak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Phosphate glass useful in high energy lasers
    Patent number: 5173456
    Abstract: A low-or no-silica, low- or no-alkali phosphate glass useful as a laser amplifier in a multiple pass, high energy laser system having a high thermal conductivity, K.sub.90.degree. C. >0.85 W/mK, a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <80.times.10.sup.-7 /.degree.C., low emission cross section, .sigma.<2.5.times.10.sup.-20 cm.sup.2, and a high fluorescence lifetime, .tau.>325 .mu.secs at 3 wt. % Nd doping, consisting essentially of (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 52-72 Al.sub.2 O.sub.3 0-<20 B.sub.2 O.sub.3 >0-25 ZnO 0-31 Li.sub.2 O 0-5 K.sub.2 O 0-5 Na.sub.2 O 0-5 Cs.sub.2 O 0-5 Rb.sub.2 O 0-5 MgO >0-<30 CaO 0-20 BaO 0-20 SrO 0-<20 Sb.sub.2 O.sub.3 0-<1 As.sub.2 O.sub.3 0-<1 Nb.sub.2 O.sub.5 0-<1 Ln.sub.2 O.sub.3 up to 6.5 PbO 0-<5 SiO.sub.2 0-3 ______________________________________whereinLn.sub.2 O.sub.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: December 22, 1992
    Assignee: Schott Glass Technologies, Inc.
    Inventors: Yuiko T. Hayden, Donna Guesto-Barnak