Patents by Inventor Arthur Wellington Francis, Jr.

Arthur Wellington Francis, Jr. 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).

  • Hot gas reactor and process for using same
    Patent number: 6471937
    Abstract: The invention comprises a reactor having a source of a first hot reactant gas, a mixing chamber in which said first hot reactant gas mixes with a second reactant gas to form a reactant gas mixture, but wherein substantially no reaction takes place and a reaction zone wherein said mixture undergoes vapor phase reaction. A process for using the reactor is also disclosed.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: October 29, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: John Erling Anderson, Arthur Wellington Francis, Jr., Matthew Lincoln Wagner, Christopher Brian Leger
  • Wide flame burner
    Patent number: 6132204
    Abstract: A nozzle assembly, a burner and a method for producing a wide combustion flame are provided. The burner has a plurality of refractory nozzles, each having a minimum wall thickness of from about 0.25 to about 0.33 of the minimum nozzle dimension. Each nozzle has a plurality of orifices to enable the gas to be projected in a parallel plane with the gas projected in a plane from the other nozzle.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: October 17, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: William Joseph Snyder, Arthur Wellington Francis, Jr.
  • Low NO.sub.x combustion process
    Patent number: 6007326
    Abstract: A low NO.sub.x combustion process is carried out by reacting low concentrations of combustibles with low concentrations of oxygen. These low concentrations are obtained by injecting high velocity fuel and oxidant streams through port openings that are spatially separated.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: December 28, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Harry Monroe Ryan, III, Arthur Wellington Francis, Jr., Michael Francis Riley, Hisashi Kobayashi
  • Method of protective atmosphere heating
    Patent number: 5961689
    Abstract: A method for heating and/or melting a charge such as aluminum in a furnace using heat generated by combustion to radiatively heat the charge through a layer of protective gas wherein combustion reaction products generated by the combustion are exhausted from a lower level within the furnace, and, during melting, the protective gas layer has a higher upper boundary than during a subsequent heating period, enabling reduced NO.sub.x generation, lower fuel and oxygen consumption and reduced refractory corrosion by avoiding furnace gas flow through the high temperature upper furnace region.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: October 5, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Hisashi Kobayashi, Arthur Wellington Francis, Jr., Xueping Li
  • Combustion using argon with oxygen
    Patent number: 5674064
    Abstract: A combustion method wherein fuel is mixed with an oxidant mixture comprising a defined concentration of argon and nitrogen and combusted resulting in reduced generation of particulate pollutants. The argon increases the mass and the nitrogen increases the volume of the oxidant improving the combustion reaction. Alternatively argon is mixed with fuel and the resulting mixture subsequently mixed with oxidant for combustion.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: October 7, 1997
    Assignee: Praxair Technology, Inc.
    Inventor: Arthur Wellington Francis, Jr.