Patents by Inventor Andrew Joseph Woytek

Andrew Joseph Woytek 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).

  • 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
  • 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
  • Package for safe storage of electrophilic fluorinating agent
    Patent number: 6365246
    Abstract: An economical means of safely “containing” or “packaging” commercial electrophilic fluorination agents whereby these agents are readily stored and transported in a package, typically without loss of “F+” activity, and in a form which is readily and directly useable, i.e., in solution or a slurry. Importantly, the solution/slurry medium provides a tremendous safety margin for storage and transportation since the solution medium has an enormous ability to absorb heat (due to the latent heat of vaporization of the liquid) relative to the contained active fluorination agent.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: April 2, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert George Syvret, James Joseph Hart, Andrew Joseph Woytek, Frank Michael Prozonic
  • 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
  • Preparation of nitrogen trifluoride
    Patent number: 4091081
    Abstract: Nitrogen trifluoride is prepared by passing elemental fluorine in intimate contact with liquid phase ammonium acid fluoride maintained at a temperature above its melting point but below about 400.degree. F for a time sufficient to effect reaction. Generally, ammonia is injected into the ammonium acid fluoride along with the fluorine to maintain a molar ratio of by-product hydrogen fluoride to ammonia of approximately 2.0 to 2.5.
    Type: Grant
    Filed: April 19, 1977
    Date of Patent: May 23, 1978
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew Joseph Woytek, John Theodore Lileck