Patents by Inventor Masahisa Iba

Masahisa Iba 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).

  • Process for treating waste slags
    Patent number: 4225565
    Abstract: In the treating of waste slags produced in the desulfurization and/or dephosphorization of molten pig iron with alkali carbonates, the alkali is recovered by extracting said waste slags with hot water while feeding carbon dioxide gas to form an extraction solution having a pH of 9.0-11.5 and recovering alkali carbonates from said extraction solution. The extraction solution contains little sulphur and silicates, from which alkali carbonates can be easily recovered with high yield therefrom.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: September 30, 1980
    Assignees: Tokuyama Soda Company Limited, Sumitomo Metal Industries Limited
    Inventors: Katsukiyo Marukawa, Setsuo Okamoto, Kazunari Yamada, Masahisa Iba