Patents by Inventor Seiichi Nagao

Seiichi Nagao 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).

  • Flat extruded aluminum multi-port tube whose inner surface is highly corrosion-resistant and an aluminum heat exchanger using the tube
    Patent number: 11255618
    Abstract: In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: February 22, 2022
    Assignees: UACJ CORPORATION, UACJ EXTRUSION CORPORATION, DENSO CORPORATION
    Inventors: Shinichi Nakamura, Naoki Yamashita, Seiichi Nagao, Satoshi Shibata, Kazuhisa Naitou, Takeshi Okinotani, Susumu Ichikawa, Akira Itoh
  • FLAT EXTRUDED ALUMINUM MULTI-PORT TUBE WHOSE INNER SURFACE IS HIGHLY CORROSION-RESISTANT AND AN ALUMINUM HEAT EXCHANGER USING THE TUBE
    Publication number: 20200124362
    Abstract: In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Applicants: UACJ CORPORATION, UACJ EXTRUSION CORPORATION, DENSO CORPORATION
    Inventors: Shinichi NAKAMURA, Naoki YAMASHITA, Seiichi NAGAO, Satoshi SHIBATA, Kazuhisa NAITOU, Takeshi OKINOTANI, Susumu ICHIKAWA, Akira ITOH
  • FLAT EXTRUDED ALUMINUM MULTI-PORT TUBE WHOSE INNER SURFACE IS HIGHLY CORROSION-RESISTANT AND AN ALUMINUM HEAT EXCHANGER USING THE TUBE
    Publication number: 20180164052
    Abstract: In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.
    Type: Application
    Filed: February 6, 2018
    Publication date: June 14, 2018
    Applicants: UACJ CORPORATION, UACJ EXTRUSION CORPORATION, DENSO CORPORATION
    Inventors: Shinichi NAKAMURA, Naoki YAMASHITA, Seiichi NAGAO, Satoshi SHIBATA, Kazuhisa NAITOU, Takeshi OKINOTANI, Susumu ICHIKAWA, Akira ITOH
  • Malleable magnesium alloy
    Publication number: 20020102179
    Abstract: A building structural material produced by A magnesium alloy contains aluminum in a range of 0.1 wt % to 1.0 wt %, zinc in a range of 0.1 wt % to 2.0 wt %, manganese in a range of 0.1 wt % to 1.0 wt %, 0.04 wt % or less copper, 0.05 wt % or less silicon, 0.005 wt % or less iron, and 0.005 wt % or less nickel. This building structural material had no cracks even when it was extruded at an extrusion speed about ten times as high as the conventional speed and also no ignition attributable to surface oxidation occurred.
    Type: Application
    Filed: September 28, 2001
    Publication date: August 1, 2002
    Inventors: Tsutomu Murai, Susumu Miyamoto, Yanao Aso, Yoshinari Oki, Hideo Sano, Seiichi Nagao, Shinichi Matsuoka