Patents by Inventor Tadao Kawamura

Tadao Kawamura 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).

  • Basic zinc carbonate-activated carbon deodorant
    Patent number: 5718889
    Abstract: A deodorant composition comprises an activated carbon, a binder, an argillaceous material, and a basic zinc carbonate. A deodorant is manufactured by the following steps: (a) a mixing step of the composition materials, (b) a kneading step to knead the mixture, (c) an extrusion to shape the kneaded mixture into a honeycomb structured solid or a powder, and (d) a drying step to remove moisture from the solid. The honeycomb structured deodorant has excellent odor absorption particularly for odors, hydrocarbons, and nitrogen oxides in vehicle exhausts.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: February 17, 1998
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Manabu Mizobuchi, Tadao Kawamura, Kazuhiro Matsuura, Takaharu Nakagawa, Toshiyuki Yamauchi