Patents by Inventor Barry C. Hobson

Barry C. Hobson 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).

  • Manufacture of continuous glass filaments and compositions therefor
    Patent number: 4454238
    Abstract: A glass composition which can be drawn into continuous filaments at a temperature of 1050.degree. C. or below, without risk of devitrification (crystallization), comprises by weight:______________________________________ % ______________________________________ SiO.sub.2 49-55 Al.sub.2 O.sub.3 2-4 B.sub.2 O.sub.3 7-10 Na.sub.2 O 14-18 K.sub.2 O 0.5-3 CaO 8-12 ZnO 1-4.5 ZrO.sub.2 1-7.5 ______________________________________and has a 1000-poise viscosity temperature not greater than 1050.degree. C. and a liquidus temperature at least 20.degree. C. below the 1000-poise viscosity temperature.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: June 12, 1984
    Assignee: T & N Research Materials Ltd.
    Inventors: Barry C. Hobson, John Woodthorpe