Patents by Inventor Masaaki Zenigame

Masaaki Zenigame 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).

  • Multilayer packaging film
    Patent number: 5736260
    Abstract: A laminated film useful for packaging includes two outer layers and a core layer of a polypropylene resin interposed therebetween. Each of the outer layers includes (A) an ethylene-.alpha.-olefin copolymer having a density of less than 0.910 g/cm.sup.3 but not less than 0.870 g/cm.sup.3 and an ethylene content of at least 50 mol % and showing only one endothermic peak when analyzed by differential scanning calorimetry (DSC), (B) an ethylene-.alpha.-olefin copolymer having a density of 0.910-0.935 g/cm.sup.3 and an ethylene content of at least 50 mol %, and (C) an anti-fogging agent. The density of (B) is greater by at least 0.008 g/cm.sup.3 than that of (A).
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: April 7, 1998
    Assignees: Sumitomo Chemical Company, Limited, Okura Industrial Co., Ltd.
    Inventors: Haruo Hayashida, Akihiro Ichige, Takeshi Yamada, Kazuo Kondo, Teruo Tada, Toyoki Wano, Masaaki Zenigame
  • Wrapping multilayer film
    Patent number: 5462777
    Abstract: A wrapping multilayer film comprising at least 5 layers of(A) both the outermost layers each comprising an ethylene-.alpha.-olefin copolymer having an ethylene content of at least 50 mol %,(B) layers each comprising a propylene polymer and being disposed between the outermost layers (A), and(C) a layer comprising recycled resins and being disposed between the layers (B).
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: October 31, 1995
    Assignees: Sumitomo Chemical Company, Limited, Kura Industrial Company, Limited
    Inventors: Haruo Hayashida, Akihiro Ichige, Tadatoshi Ogawa, Takeshi Yamada, Teruo Tada, Masaaki Zenigame, Toyoki Wano, Kazuo Kondo