Patents by Inventor Yoshihiko Tomioka

Yoshihiko Tomioka 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).

  • Patent number: 4851245
    Abstract: Disclosed herein is a smokable food-packaging film comprising:at least one layer of a mixture of 50 to 80 wt % polyamide having a melting point of 120.degree. to 210.degree. C. and a recrystallization temperature of not lower than 50.degree. C. and 20 to 50 wt % .alpha.-olefin - vinyl alcohol copolymer, said film having properties of an initial stress of not higher than 0.6 Kg/mm.sup.2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m.sup.2.day.atm at a temperature of 60.degree. C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m.sup.2.day.atm at a temperature of 30.degree. C. and a relative humidity of 60%, and the thickness of said film being 20 to 60 .mu.m.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: July 25, 1989
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Hisazumi, Shinichiro Funabashi, Yoshihiko Tomioka
  • Patent number: 4764406
    Abstract: Disclosed herein is a smokable food-packaging film comprising at least one layer of a mixture of 45 to 85 wt % polyamide, 10 to 45 wt % copolymer of olefin and vinyl alcohol, and 5 to 30 wt % polyolefin, in which the mixture falls in the pantagonal range defined in FIG. 1 by linear lines connecting the points A, B, C, D and E, respectively, said layer having the properties of a permability to 50% concentration of methanol of not less than 200 g/m.sup.2.day.atm at a temperature of 60.degree. C. and a relative humidity of 0% and an oxygen gas-permeability of not more than 50 cc/m.sup.2.day.atm at a temperature of 30.degree. C. and a relative humidity of 60% and a water vapor-transmission rate of not more than 70 g/m.sup.2.day at a temperature of 40.degree. C. and a relative humidity of 90%.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: August 16, 1988
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Hisazumi, Shinichiro Funabashi, Yoshihiko Tomioka