Patents by Inventor Narayan Subramaniam Pottore

Narayan Subramaniam Pottore 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).

  • Ultra fine-grained advanced high strength steel sheet having superior formability
    Patent number: 9976203
    Abstract: A cold rolled, annealed TRIP steel sheet which has a composition including (in wt. %): C: 0.1-0.3; Mn: 4-10, Al: 0.05-5, Si: 0.05-5; and Nb: 0.008-0.1, the remainder being iron and inevitable residuals. The cold rolled sheet has an ultimate tensile strength of at least 1000 MPa, and a total elongation of at least 15%. The cold rolled sheet may have at least 20% retained austenite in its microstructure and may have greater than 50% lath-type annealed ferrite structure. The cold rolled sheet may have an ultra fine grain size of less than 5 micron for the retained austenite and ferrite.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: May 22, 2018
    Assignee: ArcelorMittal
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Fonstein, Oleg N. Yakubovsky
  • Ultra Fine-Grained Advanced High Strength Steel Sheet Having Superior Formability
    Publication number: 20170114433
    Abstract: A cold rolled, annealed TRIP steel sheet which has a composition including (in wt. %): C: 0.1-0.3; Mn: 4-10, Al: 0.05-5, Si: 0.05-5; and Nb: 0.008-0.1, the remainder being iron and inevitable residuals. The cold rolled sheet has an ultimate tensile strength of at least 1000 MPa, and a total elongation of at least 15%. The cold rolled sheet may have at least 20% retained austenite in its microstructure and may have greater than 50% lath-type annealed ferrite structure. The cold rolled sheet may have an ultra fine grain size of less than 5 micron for the retained austenite and ferrite.
    Type: Application
    Filed: January 22, 2013
    Publication date: April 27, 2017
    Applicant: ArcelorMittal
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Ponstein, Oleg N. Yakubovsky
  • HIGH SILICON BEARING DUAL PHASE STEELS WITH IMPROVED DUCTILITY
    Publication number: 20150267280
    Abstract: A dual phase steel (martensite+ferrite) having a tensile strength of at least 980 MPa, and a total elongation of at least 15%. The dual phase steel may have a total elongation of at least 18%. The dual phase steel may also have a tensile strength of at least 1180 MPa. The dual phase steel may include between 0.5-3.5 wt. % Si, and more preferably between 1.5-2.5 wt. % Si.
    Type: Application
    Filed: November 28, 2012
    Publication date: September 24, 2015
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Fonstein
  • Ultra Fine-Grained Advanced High Strength Steel Sheet Having Superior Formability
    Publication number: 20140205488
    Abstract: A cold rolled, annealed TRIP steel sheet which has a composition including (in wt. %): C: 0.1-0.3; Mn: 4-10, Al: 0.05-5, Si: 0.05-5; and Nb: 0.008-0.1, the remainder being iron and inevitable residuals. The cold rolled sheet has an ultimate tensile strength of at least 1000 MPa, and a total elongation of at least 15%. The cold rolled sheet may have at least 20% retained austenite in its microstructure and may have greater than 50% lath-type annealed ferrite structure. The cold rolled sheet may have an ultra fine grain size of less than 5 micron for the retained austenite and ferrite.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 24, 2014
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Ponstein, Oleg N. Yakubovsky
  • HIGH SILICON BEARING DUAL PHASE STEELS WITH IMPROVED DUCTILITY
    Publication number: 20140147329
    Abstract: A dual phase steel (martensite+ferrite) having a tensile strength of at least 980 MPa, and a total elongation of at least 15%. The dual phase steel may have a total elongation of at least 18%. The dual phase steel may also have a tensile strength of at least 1180 MPa. The dual phase steel may include between 0.5-3.5 wt. % Si, and more preferably between 1.5-2.5 wt. % Si.
    Type: Application
    Filed: November 28, 2012
    Publication date: May 29, 2014
    Inventors: Hyun Jo Jun, Narayan Subramaniam Pottore, Nina Michailovna Fonstein