Patents by Inventor George M. Meseha

George M. Meseha 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).

  • Copper surface pickling system
    Patent number: 5904157
    Abstract: A copper surface pickling process is improved by providing most of the oxidizing agent (such as hydrogen peroxide) used in the process in a separate bath following a primarily acid bath. The temperature of the separate hydrogen peroxide bath can be kept lower, which reduces hydrogen peroxide loss and therefore consumption. After the hydrogen peroxide bath, the copper surface is subjected to high pressure rinsing, including a final stage in which purified (e.g., distilled) water is used.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: May 18, 1999
    Assignee: Phelps Dodge Industries, Inc.
    Inventors: George M. Meseha, Fausto V. Travares, Ramana V. Appadwedula, Emory C. Brown
  • Molten metal degassing and filtering methods
    Patent number: 5891215
    Abstract: Molten metal (e.g., on its way to a continuous casting machine for forming a bar that will be rolled into a rod to be drawn down to wire) is filtered to remove particulate impurities by passing it through at least one and preferably several ceramic filters. In addition, the molten metal is degassed by injecting a flushing gas into the metal through one or more porous plugs in the bottom of the chamber through which the molten metal flows. A partial vacuum column above each porous plug is used to help pull gas up through and out of the metal.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: April 6, 1999
    Assignee: Phelps Dodge Industries, Inc.
    Inventors: George M. Meseha, Fausto Tavares
  • Molten metal degassing and filtering apparatus
    Patent number: 5733500
    Abstract: Molten metal (e.g., on its way to a continuous casting machine for forming a bar that will be rolled into a rod to be drawn down to wire) is filtered to remove particulate impurities by passing it through at least one and preferably several ceramic filters. In addition, the molten metal is degassed by injecting a flushing gas into the metal through one or more porous plugs in the bottom of the chamber through which the molten metal flows. A partial vacuum column above each porous plug is used to help pull gas up through and out of the metal.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: March 31, 1998
    Assignee: Phelps Dodge Industries, Inc.
    Inventors: George M. Meseha, Fausto Tavares