Patents by Inventor Yuji Tomimasu

Yuji Tomimasu 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).

  • Rolled wire rod and manufacturing method thereof
    Patent number: 9169530
    Abstract: A rolled wire rod includes, as a chemical component, by mass %, C: 0.95% to 1.10%, Si: 0.10% to 0.70%. Mn: 0.20% to 1.20%, and Cr: 0.90% to 1.60%, the balance consisting of Fe and unavoidable impurities, in which a metallographic structure of the rolled wire rod includes, by an area ratio, 90% to 100% of pearlite, 0% to 5% of proeutectoid cementite, and 0% to 10% of degenerate pearlite having granular cementite, an average size of a pearlite block of the pearlite is 1.0 ?m to 15 ?m, and a maximum size of the pearlite block is 1 to 4 times the average size.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: October 27, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masashi Sakamoto, Junichi Kodama, Akira Nishida, Osamu Ooyama, Yuji Tomimasu, Kenichi Nakamura
  • ROLLED WIRE ROD AND MANUFACTURING METHOD THEREOF
    Publication number: 20150167112
    Abstract: A rolled wire rod includes, as a chemical component, by mass %, C: 0.95% to 1.10%, Si: 0.10% to 0.70%. Mn: 0.20% to 1.20%, and Cr: 0.90% to 1.60%, the balance consisting of Fe and unavoidable impurities, in which a metallographic structure of the rolled wire rod includes, by an area ratio, 90% to 100% of pearlite, 0% to 5% of proeutectoid cementite, and 0% to 10% of degenerate pearlite having granular cementite, an average size of a pearlite block of the pearlite is 1.0 ?m to 15 ?m, and a maximum size of the pearlite block is 1 to 4 times the average size.
    Type: Application
    Filed: January 17, 2013
    Publication date: June 18, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masashi Sakamoto, Junichi Kodama, Akira Nishida, Osamu Ooyama, Yuji Tomimasu, Kenichi Nakamura