Patents by Inventor Andre Deon Walker

Andre Deon Walker 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).

  • Patent number: 7159419
    Abstract: A system and method for preparing chalcogenide glass are provided that allow for larger quantities of glass to be produced with lower production costs and less risks of environmental hazards. The system includes a reaction container operable to hold chalcogenide glass constituents during a glass formation reaction, a stirring rod operable to mix the contents of the reaction container, a thermocouple operable to measure the temperature inside the reaction container, and a reaction chamber operable to hold the reaction container. The method includes placing chalcogenide glass constituents in a reaction container, heating the chalcogenide glass constituents above the melting point of at least one of the constituents, promoting dissolving or reaction of the other constituents, stirring the reaction melt, maintaining an overpressure of at least one atmosphere over the reaction melt, and cooling the reaction melt to below the chalcogenide glass transition temperature.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: January 9, 2007
    Assignee: Umicore SA
    Inventors: Athanasios John Syllaios, William David Autery, Gregory Stewart Tyber, Marissa Marie Barnard, Donald Bryan Christian, Allan Leroy Buehler, Andre Deon Walker
  • Publication number: 20040206119
    Abstract: A system and method for preparing chalcogenide glass are provided that allow for larger quantities of glass to be produced with lower production costs and less risks of environmental hazards. The system includes a reaction container operable to hold chalcogenide glass constituents during a glass formation reaction, a stirring rod operable to mix the contents of the reaction container, a thermocouple operable to measure the temperature inside the reaction container, and a reaction chamber operable to hold the reaction container. The method includes placing chalcogenide glass constituents in a reaction container, heating the chalcogenide glass constituents above the melting point of at least one of the constituents, promoting dissolving or reaction of the other constituents, stirring the reaction melt, maintaining an overpressure of at least one atmosphere over the reaction melt, and cooling the reaction melt to below the chalcogenide glass transition temperature.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 21, 2004
    Applicant: RAYTHEON COMPANY
    Inventors: Athanasios John Syllaios, William David Autery, Gregory Stewart Tyber, Marissa Marie Barnard, Donald Bryan Christian, Allan Leroy Buehler, Andre Deon Walker