Patents by Inventor Mineo Niizuma

Mineo Niizuma 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).

  • Continuous cast slab and producing method therefor
    Patent number: 8939194
    Abstract: A continuous cast slab includes the following component: by mass %, C: 0.01˜0.3%, Si: 0.05˜0.5%, Mn: 0.4˜2%, P: 0.03% or less, S: 0.03 or less, Al: 0.005˜0.03%, Ni: 0.2˜2%, O: 0.006% or less, and N: 0.006% or less; wherein the balance is composed of Fe and inevitable impurities; wherein a structure in steel in a region within at least 2 mm from a broad surface is composed of ferrite and pearlite and a equivalent circular diameter of ferrite grains in the region is equal to or shorter than 30 ?m.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: January 27, 2015
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Akihito Kiyose, Toshiyuki Kajitani, Mineo Niizuma, Yasuhiko Otani
  • CONTINUOUS CAST SLAB AND PRODUCING METHOD THEREFOR
    Publication number: 20110103996
    Abstract: A continuous cast slab includes the following component: by mass %, C: 0.01˜0.3%, Si: 0.05˜0.5%, Mn: 0.4˜2%, P: 0.03% or less, S: 0.03 or less, Al: 0.005˜0.03%, Ni: 0.2˜2%, O: 0.006% or less, and N: 0.006% or less; wherein the balance is composed of Fe and inevitable impurities; wherein a structure in steel in a region within at least 2 mm from a broad surface is composed of ferrite and pearlite and a equivalent circular diameter of ferrite grains in the region is equal to or shorter than 30 ?m.
    Type: Application
    Filed: July 15, 2009
    Publication date: May 5, 2011
    Inventors: Akihito Kiyose, Toshiyuki Kajitani, Mineo Niizuma, Yasuhiko Otani