Patents by Inventor Akimichi Kojima

Akimichi Kojima 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).

  • HIGH-STRENGTH COPPER ALLOY
    Publication number: 20120027638
    Abstract: A high-strength copper alloy contains 20 to 45% of zinc, 0.3 to 1.5% of iron, 0.3 to 1.5% of chromium, and a balance of copper, based on mass.
    Type: Application
    Filed: April 16, 2010
    Publication date: February 2, 2012
    Applicant: San-Etsu Metals Co., Ltd.
    Inventors: Yoshiharu Kosaka, Akimichi Kojima, Katsuyoshi Kondoh
  • BRASS ALLOY POWDER, BRASS ALLOY EXTRUDED MATERIAL, AND METHOD FOR PRODUCING THE BRASS ALLOY EXTRUDED MATERIAL
    Publication number: 20110056591
    Abstract: Brass alloy powder has a brass composition formed by a mixed phase of ?-phase and ?-phase, and contains 0.5 to 5.0 mass % of chromium. The chromium includes a component that is solid-solved in a mother phase of brass, and a component that is precipitated at crystal grain boundaries.
    Type: Application
    Filed: April 24, 2009
    Publication date: March 10, 2011
    Applicants: Japan Science and Technology Agency, Osaka University
    Inventors: Katsuyoshi Kondoh, Gen Katano, Hisashi Imai, Yoshiharu Kosaka, Akimichi Kojima
  • Copper Alloy Extruded Material and Its Manufacturing Method
    Publication number: 20090092517
    Abstract: A copper alloy extruded material is provided by extruding a copper alloy powder solidified billet and old grain boundaries remain in it.
    Type: Application
    Filed: July 25, 2006
    Publication date: April 9, 2009
    Inventors: Yoshiharu Kosaka, Masanori Okuyama, Akimichi Kojima, Katsuyoshi Kondoh