Patents by Inventor Yumi Momozono

Yumi Momozono 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).

  • Patent number: 10106871
    Abstract: A Ni-based alloy tube includes a base metal having a chemical composition consisting, by mass percent, of C: 0.15% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 50.0 to 80.0%, Ti: 0.50% or less, Cu: 0.60% or less, Al: 0.20% or less, N: 0.20% or less, and the balance: Fe and impurities; and a low Cr content complex oxide film having a thickness of 25 nm or smaller at least on an inner surface of the base metal, wherein contents of Al, Ni, Si, Ti, and Cr in the film satisfy [at % Al/at % Cr?2.00], [at % Ni/at % Cr?1.40], and [(at % Si+at % Ti)/at % Cr?0.10].
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: October 23, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Masaki, Manabu Kanzaki, Kazuyuki Kitamura, Shoji Kinomura, Yumi Momozono, Osamu Miyahara
  • Patent number: 9859026
    Abstract: An austenitic alloy tube subjected to a cold working and an annealing heat treatment contains C: 0.01% to 0.15%, Cr: 10.0% to 40.0%, Ni: 8.0% to 80.0%, in mass %, and has a metallographic structure satisfying the following Expressions (i) to (iii). R?f1??(i) R=I220/I111??(ii) f1=0.28×(F1118.0/(F1118.0+0.358.0))??(iii) Where, in the above Expressions, R is a ratio of an integrated intensity of {220} to an integrated intensity of {111} on a surface layer which is measured by a grazing incidence X-ray diffraction method, I220 is the integrated intensity of {220}, I111 is the integrated intensity of {111}, and F111 is full width of half maximum of {111} on the surface layer which is measured by the grazing incidence X-ray diffraction method.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: January 2, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yumi Momozono, Mitsuharu Yonemura, Yasuhiro Masaki, Manabu Kanzaki
  • Publication number: 20170298478
    Abstract: A Ni-based alloy tube includes a base metal having a chemical composition consisting, by mass percent, of C: 0.15% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 50.0 to 80.0%, Ti: 0.50% or less, Cu: 0.60% or less, Al: 0.20% or less, N: 0.20% or less, and the balance: Fe and impurities; and a low Cr content complex oxide film having a thickness of 25 nm or smaller at least on an inner surface of the base metal, wherein contents of Al, Ni, Si, Ti, and Cr in the film satisfy [at % Al/at % Cr?2.00], [at % Ni/at % Cr?1.40], and [(at % Si+at % Ti)/at % Cr?0.10].
    Type: Application
    Filed: September 29, 2015
    Publication date: October 19, 2017
    Inventors: Yasuhiro MASAKI, Manabu KANZAKI, Kazuyuki KITAMURA, Shoji KINOMURA, Yumi MOMOZONO, Osamu MIYAHARA
  • Publication number: 20150194227
    Abstract: An austenitic alloy tube subjected to a cold working and an annealing heat treatment contains C: 0.01% to 0.15%, Cr: 10.0% to 40.0%, Ni: 8.0% to 80.0%, in mass %, and has a metallographic structure satisfying the following Expressions (i) to (iii). R?f1??(i) R=I220/I111??(ii) f1=0.28×(F1118.0/(F1118.0+0.358.0))??(iii) Where, in the above Expressions, R is a ratio of an integrated intensity of {220} to an integrated intensity of {111} on a surface layer which is measured by a grazing incidence X-ray diffraction method, I220 is the integrated intensity of {220}, I111 is the integrated intensity of {111}, and F111 is full width of half maximum of {111} on the surface layer which is measured by the grazing incidence X-ray diffraction method.
    Type: Application
    Filed: June 19, 2013
    Publication date: July 9, 2015
    Inventors: Yumi Momozono, Mitsuharu Yonemura, Yasuhiro Masaki, Manabu Kanzaki