Patents by Inventor Kiyoji Sagisaka

Kiyoji Sagisaka 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).

  • Method using copper-copper-alloy tube for water supply
    Patent number: 4337785
    Abstract: Tubes for water and/or hot-water supply use, which are made of Cu-base-alloys essentially containing Mg from 0.05 to 2.8 wt % and the balance Cu and inevitable impurities, have been found to have conspicuously low dissolution rates of undesirable ions, especially Cu ions and other ions, even in stagnant water and/or at elevated temperature. The alloys are desirably further contain up to 1.0% Ca to further restrain dissolution of Cu ions.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: July 6, 1982
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Shiro Sato, Kiyoji Sagisaka
  • Copper-alloy tube water supply
    Patent number: 4337793
    Abstract: Tubes for water and/or hot-water supply use, which are made of Cu-base-alloys essentially containing Mg from 0.05 to 2.8 wt % and the balance Cu and inevitable impurities, have been found to have conspicuously low dissolution rates of undesirable ions, especially Cu ions and other ions, even in stagnant water and/or at elevated temperature. The alloys are desirably further contain up to 1.0% Ca to further restrain dissolution of Cu ions.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: July 6, 1982
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Shiro Sato, Kiyoji Sagisaka