Patents by Inventor James Francis Heffron

James Francis Heffron 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).

  • Refining nonferrous metals and alloys with gases having reduced global warming potential
    Patent number: 6682585
    Abstract: An improved method of processing both primary and secondary nonferrous metal and alloys of said metals using a refining gas is provided. The improvement involves refining said non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of ClF3, ClF, COF2, F3COF, CF2(OF)2, SO2F2, NF3, SO2ClF, SOF2, SOF4, NOF, F2 and SF4.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: January 27, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Peter Hobbs, James Francis Heffron, Zbigniew Zurecki
  • Blanketing metals and alloys at elevated temperatures with gases having reduced global warming potential
    Patent number: 6521018
    Abstract: An improved method of processing a nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the nonferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of COF2, CF3COF, (CF3)2CO, F3COF, F2C(OF)2, SO2F2, NF3, SO2ClF, SOF2, SOF4, NOF, F2 and SF4.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: February 18, 2003
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Peter Hobbs, James Francis Heffron, Andrew Joseph Woytek, Zbigniew Zurecki
  • Refining nonferrous metals and alloys with gases having reduced global warming potential
    Publication number: 20020166413
    Abstract: An improved method of processing both primary and secondary nonferrous metal and alloys of said metals using a refining gas having a global warming potential is provided. The improvement involves reducing said global warming potential of said refining gas by refining said non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of ClF3, ClF, COF2, F3COF, CF2(OF)2, SO2F2, NF3, SO2ClF, SOF2, SOF4, NOF, F2 and SF4.
    Type: Application
    Filed: January 16, 2002
    Publication date: November 14, 2002
    Inventors: John Peter Hobbs, James Francis Heffron, Zbigniew Zurecki
  • Blanketing molten nonferrous metals and alloys with gases having reduced global warming potential
    Patent number: 6398844
    Abstract: An improved method of processing a molten non-ferrous metal and alloys of the metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the molten non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of SO2F2, NF3, SO2CLF, SOF4, and NOF.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: June 4, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Peter Hobbs, James Francis Heffron, Andrew Joseph Woytek
  • Blanketing metals and alloys at elevated temperatures with gases having reduced global warming potential
    Publication number: 20010027702
    Abstract: An improved method of processing a nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the nonferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of COF2, CF3COF, (CF3)2CO, F3COF, F2C(OF)2, SO2F2, NF3, SO2ClF, SOF2, SOF4, NOF, F2 and SF4.
    Type: Application
    Filed: February 9, 2001
    Publication date: October 11, 2001
    Inventors: John Peter Hobbs, James Francis Heffron, Andrew Joseph Woytek, Zbigniew Zurecki
  • Method and apparatus for reducing NOx production during air-oxygen-fuel combustion
    Patent number: 5871343
    Abstract: Method and apparatus for reducing NOx production during air-oxygen-fuel combustion by providing a central core of fuel surrounded by a sheath of oxygen at a combustion end of an air-oxygen-fuel burner. Diametrically opposed air passages are provided on either side of the oxygen sheath to permit entrainment of furnace gases into a flame zone created by primary combustion of fuel and oxygen. Oxygen can be introduced into each air passage to enhance combustion with low NOx emissions.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: February 16, 1999
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Charles Edward Baukal, Jr., Vladimir Yliy Gershtein, James Francis Heffron, Robert C. Best, Prince Boyd Eleazer, III