Patents by Inventor Etsuro Masuda

Etsuro Masuda 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).

  • Method for the preparation of polykis-azobenzenes
    Patent number: 4875986
    Abstract: Polykis-azobenzenes as an important coloring material can be prepared by irradiating diazidobenzene or a derivative thereof with ultraviolet light in the form of a solution in an organic solvent, in the form of a thin film or fine powder or in the form of vapor under reduced pressure.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: October 24, 1989
    Assignee: Japan as represented by Director General of Agency of Industrial Science and Technology
    Inventors: Akira Yabe, Akihiko Ouchi, Hiroshi Moriyama, Etsuro Masuda
  • Process for removing nitrogen oxides from gaseous mixtures
    Patent number: 4086327
    Abstract: Gaseous mixtures containing nitrogen oxides are contacted with an aqueous solution containing sodium sulfite, trisodium imidobissulfate and sodium sulfate while adjusting the pH thereof by sodium hydroxide or sodium carbonate, and sulfur dioxide is contacted therewith simultaneously or thereafter to produce therein disodium imidobissulfate and sodium hydrogensulfate, and then sodium hydroxide is added therein to deposit sodium sulfate 10 hydrate firstly and trisodium imidobissulfate 1 hydrate secondly, and thereafter the mother liquor is recycled as the absorption medium for nitrogen oxides.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: April 25, 1978
    Assignee: Agency of Industrial Science & Technology
    Inventors: Yukio Ito, Yosiro Yasumoto, Etsuro Masuda, Hiroshi Suzuki