Patents by Inventor Iwao Nakayasu

Iwao Nakayasu 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 liquids of acid decontamination agents
    Patent number: 4863637
    Abstract: A new process for treating waste liquids of acid decontamination agent is disclosed which comprises the steps of neutralizing a waste liquid of acid decontamination agents with an alkali, filtering out suspended matter from the neutralized waste liquid using a filter, removing inhibitors from the filtered waste liquid by adsorption with activated charcoal, removing radioactive ions from the waste liquid treated by activated charcoal with a chelate resin, concentrating the chelate resin-treated waste liquid by evaporation, and bituminizing the concentrate obtained in the preceding step.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: September 5, 1989
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Hiroyo Matsumoto, Akira Kakimoto, Iwao Nakayasu, Kazuo Yonekura