Patents by Inventor Nobuhisa Ota

Nobuhisa Ota 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).

  • Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device
    Patent number: 6273347
    Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: August 14, 2001
    Assignee: Kaneka Corporation
    Inventors: Tsuyoshi Mihayashi, Nobuhisa Ota, Naruhiko Akamatsu, Yutaka Yanagihara, Takeshi Satoh
  • Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device
    Patent number: 6130266
    Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: October 10, 2000
    Assignee: Kaneka Corporation
    Inventors: Tsuyoshi Mihayashi, Nobuhisa Ota, Naruhiko Akamatsu, Yutaka Yanagihara, Takeshi Satoh