Patents by Inventor William E. Horsfall

William E. Horsfall 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).

  • Lamp reflector substrate, glass, glass-ceramic materials and process for making the same
    Patent number: 7285506
    Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO2; 9-22% Al2O3; 3.4-3.8% Li2O; 1.8-2.6% ZnO; 1.5-2.5% MgO; 3.3-5% TiO2; 0-2.5% ZrO2; 1.5-3% B2O3; 0-6% P2O5; 0-0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-spodumene solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: October 23, 2007
    Assignee: Corning Incorporated
    Inventors: William E. Horsfall, Ronald L. Stewart
  • Lamp reflector substrate, glass, glass-ceramic materials and process for making the same
    Patent number: 7199066
    Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56–67% SiO2; 9–22% Al2O3; 3.4–3.8% Li2O; 1.8–2.6% ZnO; 1.5–2.5% MgO; 3.3–5% TiO2; 0–2.5% ZrO2; 1.5–3% B2O3; 0–6% P2O5; 0–0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-spodumene solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: April 3, 2007
    Assignee: Corning Incorporated
    Inventors: William E. Horsfall, Ronald L. Stewart
  • Lamp reflector substrate, glass, glass-ceramic materials and process for making the same
    Patent number: 7091141
    Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56–67% SiO2; 9–22% Al2O3; 3.4–3.8% Li2O; 1.8–2.6% ZnO; 1.5–2.5% MgO; 3.3–5% TiO2; 0–2.5% ZrO2; 1.5–3% B2O3; 0–6% P2O5; 0–0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains ?-quartz solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material. The glass-ceramic material is particularly suitable for heat-resistant lamp reflectors which require a high surface smoothness Ra of lower than 75 nm, a low CTE between 25 and 300° C. of less than 10×10?7 K?1, and IR transmission at about 1050 nm of over 80% at a thickness of 3 mm.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: August 15, 2006
    Assignee: Corning Incorporated
    Inventors: William E. Horsfall, Ronald L. Stewart
  • Lamp reflector substrate, glass, glass-ceramic materials and process for making the same
    Publication number: 20040198579
    Abstract: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO2; 9-22% Al2O3; 3.4-3.8% Li2O; 1.8-2.6% ZnO; 1.5-2.5% MgO; 3.3-5% TiO2; 0-2.5% ZrO2; 1.5-3% B2O3; 0-6% P2O5; 0-0.6% F; less than 500 ppm Fe; and components resulting from effective amount of at least one refining agent. The glass-ceramic material of the present invention contains &bgr;-quartz solid solution as the predominant crystalline phase, and can be obtained by proper thermal treatment of the glass-ceramic material. The glass-ceramic material is particularly suitable for heat-resistant lamp reflectors which require a high surface smoothness Ra of lower than 75 nm, a low CTE between 25 and 300° C. of less than 10×10−7 K−1, and IR transmission at about 1050 nm of over 80% at a thickness of 3 mm.
    Type: Application
    Filed: March 18, 2004
    Publication date: October 7, 2004
    Inventors: William E. Horsfall, Ronald L. Stewart
  • Infrared, glass polarizer and method
    Patent number: 6606885
    Abstract: A glass polarizer and a method of making the polarizer, the polarizer being produced from an R2O—Al2O3—B2O3—SiO2 glass containing limited amounts of ZrO2 and TiO2, and having a silver halide liquidus temperature and a rutile liquidus temperature, both temperatures being not over 995° C.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: August 19, 2003
    Assignee: Corning Incorporated
    Inventors: Michael D. Harris, Thomas G. Havens, William E. Horsfall, David J. Kerko
  • Infrared, glass polarizer and method
    Publication number: 20030066310
    Abstract: A glass polarizer and a method of making the polarizer, the polarizer being produced from an R2O—Al2O3—B2O3—SiO2 glass containing limited amounts of ZrO2 and TiO2, and having a silver halide liquidus temperature and a rutile liquidus temperature, both temperatures being not over 995° C.
    Type: Application
    Filed: October 9, 2001
    Publication date: April 10, 2003
    Inventors: Michael D. Harris, Thomas G. Havens, William E. Horsfall, David J. Kerko