Patents by Inventor Haruyoshi Anzawa

Haruyoshi Anzawa 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: 4619849
    Abstract: A multi-layered packaging container superior in crack resistance, said container being made up of an outer layer of thermoplastic resin and an inner layer of saponified product of ethylene-vinyl acetate copolymer characterized in that the ethylene content is 25 to 60 mole %, the degree of saponification of the vinyl acetate component is higher than 96 mole %, the melt viscosity index is lower than 1, the specific gravity (d) is in the range specified by the formula (1) below, and Y.sub.1 and Y.sub.2 are in the range specified by the formula (2) below:1.274-4.4.times.10.sup.-3 X<d<1.332-4.4.times.10.sup.-3 X (1).vertline.Y.sub.1 -Y.sub.2 .vertline..ltoreq.1 (2)where d is the specific gravity of EVOH resin at 25.degree. C., X is the ethylene content (mole %) of EVOH resin, and Y.sub.1 and Y.sub.2 are the melt viscosity indices of the thermoplastic resin and the saponified product of ethylene-vinyl acetate copolymer, respectively.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: October 28, 1986
    Assignee: Kuraray Co., Ltd.
    Inventors: Haruyoshi Anzawa, Kenji Satoh, Yoshinari Tanaka, Takuji Okaya