Patents by Inventor Tetsuya Oda

Tetsuya Oda 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).

  • Polyurethane foam for cushioning materials
    Patent number: 5128381
    Abstract: Disclosed herein is a polyurethane foam for cushioning materials. The polyurethane foam is formed by reacting a mixture of a polyol component, a polyisocyanate component and other optional components. The polyol component contains a mixed polyol which is composed of a low-hydroxyl-number polyol having a hydroxyl number of 30-80 and a high-hydroxyl-number polyol having a hydroxyl number of 350-600 and has an average hydroxyl number of 120-170. The mixture may additionally contain a plasticizer component containing at least one kind of plasticizer having one active hydrogen atom per molecule.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: July 7, 1992
    Assignees: Achilles Corporation, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kouichi Tane, Katsuya Motojima, Yasumasa Sawachika, Tetsuya Oda, Yoshio Sakaguchi
  • Shock-absorbing polyurethane foam and production process thereof
    Patent number: 4987156
    Abstract: A shock-absorbing polyurethane foam is formed of a polyol component and a polyisocyanate component. The polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component. The foam further contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20.degree. C. per 100 parts by weight of the whole polyol component. The foam can be produced by reacting the polyol component and polyisocyanate component in the presence of 5-150 parts by weight of the plasticizer per 100 parts by weight of the polyol component.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: January 22, 1991
    Assignees: Achilles Corporation, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Sigeru Tozune, Shizuo Yamazaki, Ryuichi Komori, Masashi Ishii, Yoshio Sakaguchi, Tetsuya Oda
  • Process for the preparation of anhydrous magnesium chloride having a high degree of purity
    Patent number: 4228144
    Abstract: Anhydrous magnesium chloride containing substantially no magnesium oxide is produced by a process comprising reacting magnesium chloride in the form of its hexahydrate with ammonia in the presence of ammonium chloride in an aqueous media; separating the resultant precipitated magnesium chloride hexammoniate crystals from an aqueous solution containing unreacted ammonia, magnesium chloride and ammonium chloride; washing the crystals with liquid ammonia; decomposing the washed crystals into anhydrous magnesium chloride and gaseous ammonia, and; isolating the anhydrous component from the composition mixture; which process is characterized in that a portion of the separated aqueous solution is evaporated until the concentration of ammonia in the resulting residual liquid becomes 2.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: October 14, 1980
    Assignee: Ube Industries Ltd.
    Inventors: Hisashi Kono, Kenji Terai, Takazumi Niwa, Katsumi Uemura, Tetsuya Oda