Patents Assigned to Mitsubishi Steel Manufacture Co., Ltd.
  • Synthetic resin-coated spring and method for making same
    Patent number: 4753423
    Abstract: A synthetic resin-coated spring comprising a spring body and a synthetic resin coating layer formed on the spring body. The synthetic resin coating layer contains an olefin polymer modified with an unsaturated carboxylic acid or a derivative thereof. A method for making the coated spring is also described.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: June 28, 1988
    Assignees: Nippon Petrochemicals Co., Ltd, Mitsubishi Steel Manufacture Co., Ltd.
    Inventors: Kenji Ukai, Katsumi Yano, Nobumasa Umezawa, Satoru Yamaguchi, Takao Itoga