Patents by Inventor Ahmad Sarhangi

Ahmad Sarhangi 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).

  • Material and method for coating glass forming equipment
    Patent number: 6591636
    Abstract: An oxidation and corrosion resistant coating is applied to glass forming equipment by physical vapor deposition. The coating material is preferably aluminum oxide.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: July 15, 2003
    Assignee: Corning Incorporated
    Inventors: Dominick J. Forenz, Anca D. Fountain, Sherry J. Gill, Kenneth R. Salisbury, Ahmad Sarhangi, Kim E. Womer
  • Method of forming glass having integral polarizing and non-polarizing regions
    Patent number: 6089042
    Abstract: Method of making polarizing glass having integral polarizing and non-polarizing regions disclosed. The method involves applying a protective glass/frit material capable of blocking reducing gas to the surface of the glass to form a desired pattern, exposing the glass to a reducing gas atmosphere to render unprotected glass polarizing, and removing the protective glass/frit material to reveal underlying non-polarizing regions.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: July 18, 2000
    Assignee: Corning Inc.
    Inventors: Sherry Jeanne Gill, Ahmad Sarhangi
  • Method of forming glass having integral polarizing and non-polarizing regions
    Patent number: 6058738
    Abstract: Method of making polarizing glass having integral polarizing and non-polarizing regions is disclosed. The method involves applying a protective glass/frit material capable of blocking reducing gas to the surface of the glass to form a desired pattern, exposing the glass to a reducing gas atmosphere to render unprotected glass polarizing, and removing the protective glass/frit material to reveal underlying non-polarizing regions.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: May 9, 2000
    Assignee: Corning Incorporated
    Inventors: Sherry Jeanne Gill, Ahmad Sarhangi
  • Method for depositing pure metal halide compositions
    Patent number: 5277889
    Abstract: Metal halide compositions of enhanced purity are produced by vapor phase deposition via reactions involving organometallic starting materials in a process wherein a carbon getter is provided in the reaction zone and/or adjacent the developing metal halide deposit. The carbon getter reduces carbon contamination in the product which can result from side decomposition reactions involving the organometallic starting materials.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: January 11, 1994
    Assignee: Corning Incorporated
    Inventors: Joseph M. Power, Ahmad Sarhangi
  • Vapor phase method for making metal halide glasses
    Patent number: 4718929
    Abstract: A vapor phase method for making a metal halide material useful for the manufacture of an infrared transmitting optical waveguide fiber or other optical device, and the use of the method for making such a device, wherein a halogenated beta-diketonate of a metal to be incorporated in the device is converted to the corresponding metal halide by controlled decomposition of the halogenated diketonate, are described.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: January 12, 1988
    Assignee: Corning Glass Works
    Inventors: Joseph M. Power, Ahmad Sarhangi
  • Method for making metal halide optical fiber
    Patent number: 4610708
    Abstract: In the manufacture of preforms for metal halide optical fibers by the vapor deposition of metal halide layers on the inside surface of a silicate glass substrate tube, silicon release from the tube side wall by fluorine-containing reactants used in the vapor deposition process is reduced by the preliminary application of a slurry coating of a sinterable, fluorine-resistant metal halide or other glass composition which is dried and sintered to a passivation layer.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: September 9, 1986
    Assignee: Corning Glass Works
    Inventors: Ahmad Sarhangi, George W. Scherer