Patents by Inventor Sadao Ohtsuka

Sadao Ohtsuka 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).

  • Oxygen absorbent packaging
    Patent number: 4485133
    Abstract: An oxygen absorbent package comprising a rectangular nonwoven fabric sheet, a rectangular perforated film or nonwoven fabric sheet having a lower softening point than sheet, a rectangular microporous film or nonwoven fabric sheet having a higher softening point than film or sheet, and an oxygen absorbent, the three layers being heat sealed on the four sides is disclosed. The oxygen absorbent package is mainly used for storage of foodstuff, particularly liquid or semiliquid foodstuff.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: November 27, 1984
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Sadao Ohtsuka, Toshio Komatsu, Yukio Kondoh, Hideyuki Takahashi
  • Oxygen absorbent composition
    Patent number: 4199472
    Abstract: An oxygen absorbent composition consisting essentially of (a) an oxygen absorbent comprising a dithonite as a main component and (b) a fiber material in an amount of from about 1 to about 50 parts by weight per 100 parts by weight of the oxygen absorbent and a process for producing the same are disclosed.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: April 22, 1980
    Assignee: Mitsubishi Gas Chemical Company Inc.
    Inventors: Sadao Ohtsuka, Takaaki Yamaguchi