Patents by Inventor Zofia E. Niemczura

Zofia E. Niemczura 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).

  • Method and apparatus for determining the health and remaining service life of austenitic steel reformer tubes and the like
    Patent number: 9546982
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: January 17, 2017
    Assignee: ArcelorMittal
    Inventors: Michael A. Masleid, Zofia E. Niemczura, George B. Tsvik
  • METHOD AND APPARATUS FOR DETERMINING THE HEALTH AND REMAINING SERVICE LIFE OF AUSTENITIC STEEL REFORMER TUBES AND THE LIKE
    Publication number: 20150300989
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Application
    Filed: December 10, 2013
    Publication date: October 22, 2015
    Inventors: Michael A. Masleid, Zofia E. Niemczura, George B. Tsvik
  • Method for cold rolling and annealing strip cast stainless steel strip
    Patent number: 5858135
    Abstract: A method for producing strip cast, austenitic stainless steel strip comprises providing a strip cast strip having an initial microstructure including a detrimental amount of delta ferrite and a detrimental amount of dendritic structure is provided. The strip may have a composition comprising the following ingredients: 0.4 wt. % max. carbon, 5-38 wt. % nickel, and 15-28 wt. % chromium. The strip is subjected to a cold rolling step prior to any annealing step. Upon subsequent annealing, (a) the amount of delta ferrite in the strip is reduced to substantially below the detrimental amount of delta ferrite that was in the strip prior to cold rolling and (b) the amount of dendritic structure in the strip is reduced to below the detrimental amount of dendritic structure that was in the strip prior to cold rolling. By employing the method of the present invention, an austenitic stainless steel strip having a high quality surface is produced.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: January 12, 1999
    Assignee: Inland Steel Company
    Inventors: Zofia E. Niemczura, Kenneth E. Blazek
  • Method and apparatus for determining the health and remaining service life of austenitic steel reformer tubes and the like
    Patent number: RE48734
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: September 14, 2021
    Assignee: ArcelorMittal
    Inventors: Michael A. Masleid, Zofia E. Niemczura, George B. Tsvik