Patents by Inventor Julie M. Cairney

Julie M. Cairney 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).

  • Nitriding of niobium steel and product made thereby
    Patent number: 11193188
    Abstract: A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having yield strength between 650 MPa and 800 MPa and tensile strength between 750 MPa and 900 MPa.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: December 7, 2021
    Assignee: Nucor Corporation
    Inventors: Yuxuan Xie, Chen Zhu, Julie M. Cairney, Simon P. Ringer, Christopher R. Killmore, Frank Barbaro, James Williams
  • NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY
    Publication number: 20190100827
    Abstract: A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having yield strength between 650 MPa and 800 MPa and tensile strength between 750 MPa and 900 MPa.
    Type: Application
    Filed: November 28, 2018
    Publication date: April 4, 2019
    Inventors: Yuxuan XIE, Chen ZHU, Julie M. CAIRNEY, Simon P. RINGER, Christopher R. KILLMORE, Frank BARBARO, James WILLIAMS
  • NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY
    Publication number: 20120186703
    Abstract: A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having after nitriding for one hour yield strength between 600 MPa and 800 MPa and tensile strength between 650 MPa and 900 MPa and no more than a 2% decrease in total elongation from the steel product prior to nitriding.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 26, 2012
    Applicant: NUCOR CORPORATION
    Inventors: Yuxuan Xie, Sachin L. Shrestha, Peter J. Felfer, Julie M. Cairney, Chris R. Killmore, Kristin R. Carpenter, Harold R. Kaul, Simon P. Ringer
  • NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY
    Publication number: 20110277886
    Abstract: A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having yield strength between 650 MPa and 800 MPa and tensile strength between 750 MPa and 900 MPa.
    Type: Application
    Filed: February 18, 2011
    Publication date: November 17, 2011
    Applicant: NUCOR CORPORATION
    Inventors: Yuxuan Xie, Chen Zhu, Julie M. Cairney, Simon P. Ringer, Chris R. Killmore, Frank Barbaro, Jim Williams