Patents by Inventor Kazuyoshi Fujisawa

Kazuyoshi Fujisawa 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: 10744600
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 18, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazuyoshi Fujisawa, Masayuki Shibuya, Kouichi Takeuchi
  • Publication number: 20170239755
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Application
    Filed: April 18, 2017
    Publication date: August 24, 2017
    Inventors: Kazuyoshi FUJISAWA, Masayuki Shibuya, Kouichi Takeuchi
  • Patent number: 9631249
    Abstract: Martensitic mixed phase stainless steel, which has in well balance between excellent strength and formability and excellent fatigue properties, and is inexpensive, and suitable for spring members, has: a chemical composition comprising C: 0.1-0.4%, Si: at most 2.0%, Mn: 0.1-6.0%, Cr: 10.0-28.0%, N: at most 0.17%, the remainder of Fe and impurities, and a metallurgical structure which includes a ferrite phase and a martensitic phase, and also a retained austenite phase of 5 volume % or less if necessary, and which satisfies a relationship of CM/CF?5.0 where an average value CF of C content existing in the ferrite phase, and an average value CM of C content existing in the martensite.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: April 25, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiko Adachi, Takashi Maeda, Masayuki Shibuya, Kazuyoshi Fujisawa, Yuuichi Fukumura
  • Publication number: 20140299239
    Abstract: Martensitic mixed phase stainless steel, which has in well balance between excellent strength and formability and excellent fatigue properties, and is inexpensive, and suitable for spring members, has: a chemical composition comprising C: 0.1-0.4%, Si: at most 2.0%, Mn: 0.1-6.0%, Cr: 10.0-28.0%, N: at most 0.17%, the remainder of Fe and impurities, and a metallurgical structure which includes a ferrite phase and a martensitic phase, and also a retained austenite phase of 5 volume % or less if necessary, and which satisfies a relationship of CM/CF?5.0 where an average value CF of C content existing in the ferrite phase, and an average value CM of C content existing in the martensite.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 9, 2014
    Inventors: Kazuhiko Adachi, Takashi Maeda, Masayuki Shibuya, Kazuyoshi Fujisawa, Yuuichi Fukumura
  • Publication number: 20140060428
    Abstract: A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (?m) and a plate thickness t (?m) which satisfy the equation d?0.0448·t?1.28.
    Type: Application
    Filed: February 29, 2012
    Publication date: March 6, 2014
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuyoshi Fujisawa, Masayuki Shibuya, Kouichi Takeuchi
  • Patent number: 6277215
    Abstract: Engine gaskets for automobiles are fabricated from an as-quenched stainless steel having a martensitic-ferritic duplex-phase phase structure in which martensite comprises from 40% to 80%. The steel has a composition comprising on a weight basis; C+N: 0.1%-0.3%, Si: not greater than 0.5%, Mn: not greater than 0.7%, Cr: 10%-17%, and Ni: 0-0.6% and a Vickers hardness of from 300 to 500, The steel can be produced by quenching the steel after heating at 850-1000° C.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: August 21, 2001
    Assignees: Sumitomo Metal Industries, Ltd., Ishikawa Gasket Co., Ltd.
    Inventors: Kazuhiko Adachi, Kazuyoshi Fujisawa, Kenichi Goshokubo, Yoshio Yamada, Yuuichi Kinoshita