Patents by Inventor Charlene S. Smith

Charlene S. Smith 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).

  • Apparatus and methods for producing float glass having reduced defect density
    Patent number: 10280105
    Abstract: A float glass chamber and related methods include a hot section having an atmosphere in at least the lower plenum with less than 3 percent hydrogen based on volume and a cold section having a different volume percent hydrogen.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: May 7, 2019
    Inventors: Charlene S. Smith, George A. Pecoraro
  • Method for making float glass having reduced defect density
    Patent number: 7414000
    Abstract: A method for reducing the defect density of glass comprising melting a glass composition comprising from 65-75 wt. % of SiO2; from 10-20 wt. % of Na2O; from 5-15 wt. % of CaO; from 0-5 wt. % of MgO; from 0-5 wt. % of Al2O3; from 0-5 wt. % of K2O; from 0-2 wt. % Fe2O3; and from 0-2% FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: August 19, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Charlene S. Smith, George A. Pecoraro
  • Method for making float glass having reduced defect density
    Patent number: 7162892
    Abstract: A method for reducing the defect density of glass comprising melting a glass composition comprising from 65–75 wt. % of SiO2; from 10–20 wt. % of Na2O; from 5–15 wt. % of CaO; from 0–5 wt. % of MgO; from 0–5 wt. % of Al2O3; from 0–5 wt. % of K2O; from 0–2 wt. % Fe2O3; and from 0–2 % FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: January 16, 2007
    Assignee: PGG Industries Ohio, Inc.
    Inventors: Charlene S. Smith, George A. Pecoraro
  • Method for making float glass having reduced defect density
    Publication number: 20040110625
    Abstract: A method for reducing the defect density of glass comprising melting a glass composition comprising from 65-75 wt. % of SiO2; from 10-20 wt. % of Na2O; from 5-15 wt. % of CaO; from 0-5 wt. % of MgO; from 0-5 wt. % of Al2O3; from 0-5 wt. % of K2O; from 0-2 wt. % Fe2O3; and from 0-2 % FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.
    Type: Application
    Filed: September 26, 2003
    Publication date: June 10, 2004
    Inventors: Charlene S. Smith, George A. Pecoraro
  • Apparatus and method for producing float glass having reduced defect density
    Publication number: 20040107732
    Abstract: A float glass chamber and related methods comprising a hot section having an atmosphere in at least the lower plenum comprises less than 3 percent hydrogen based on volume and a cold section, wherein the boundary line between the hot section and the cold section is where the temperature of the glass falls below a threshold temperature
    Type: Application
    Filed: September 26, 2003
    Publication date: June 10, 2004
    Inventors: Charlene S. Smith, George A. Pecoraro