Patents by Inventor Sueo Kamada

Sueo Kamada 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 oxidizing hydrocyanic acid to cyanogen
    Patent number: 3949061
    Abstract: Dicyan is produced by reacting hydrocyanic acid with oxygen or oxygen-containing inert gas in an aqueous solution of copper nitrate or copper nitrate and one or more nitrates of alkali metals, alkaline earth metals or aluminum at a pH of from -0.5 to 1.5. Almost all the small quantity of nitrogen oxides by-produced in the reaction can be removed by absorbing them in the catalyst solution in which the reaction is terminated or retarded and the resulting solution can be reused by recycling.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: April 6, 1976
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takeshi Yamashita, Tooru Ide, Sueo Kamada, Takao Kitamura