Patents by Inventor Akira Toyama

Akira Toyama 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).

  • Hydrogen sulfide removal
    Patent number: 3931394
    Abstract: A process for removal and conversion into sulfur of hydrogen sulfide in a gaseous or liquid material which comprises essentially treating the said material with a nitrohumic acid or its salt prepared by treating humic acid with a nitrating agent and, if necessary, converting the resultant into an alkaline salt. The process is advantageous essentially in that hydrogen sulfide can be removed economically and converted into sulfur, and that the desulfurization agent, i.e. a nitrohumic acid or its salt is non-toxic and non-corrosive.
    Type: Grant
    Filed: May 5, 1971
    Date of Patent: January 6, 1976
    Assignee: Kobe Steel Ltd.
    Inventors: Akira Toyama, Koji Ishizaki