Patents Assigned to Fujisash Industries, Ltd.
  • Process and apparatus for separating oil from water contaminated with oil
    Patent number: 4088578
    Abstract: Water contaminated with oil is separated within a closed container into an oil layer and a water layer containing a residue of oil, because of the difference in the specific gravities of water and oil. A suction pump sucks the separated oil from the container to reduce the pressure of the liquid in the container, thereby lowering the concentration of oil residue in the separated water.
    Type: Grant
    Filed: August 4, 1976
    Date of Patent: May 9, 1978
    Assignee: Fujisash Industries, Ltd.
    Inventors: Teruo Yoshioka, Shinichi Iwanami
  • Method of producing colored anodic coating on aluminum and its alloys
    Patent number: 3945895
    Abstract: Colored anodic coating of aluminum and its alloys can be obtained by immersing the aluminum or its alloys as an anode in an aqueous electrolyte solution containing aromatic sulfonic acid and at least one of formic acid and formate salts, which solution preferably contains at least one of sulfuric acid and water soluble sulfate or bisulfate salts and by passing electric current through the electrolyte solution for a predetermined time.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: March 23, 1976
    Assignee: Fujisash Industries, Ltd.
    Inventors: Masanori Osuga, Hayao Adachi