Patents by Inventor Yoshikazu Iwaya

Yoshikazu Iwaya 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: 4424834
    Abstract: An elastic shaped article of a laminated construction of at least two layers, comprising (a) a layer of a soft polyvinyl chloride combining polyvinyl chloride with a plasticizer and (b) a layer of at least one thermoplastic elastomer selected from the group consisting of polyester type elastomers, polyurethane type elastomers, and polyamide type elastomers is useful for production of boots, ducts, hoses, tubes, sealing members, covering members, etc. in various transportation machines, construction machines, industrial machines, machine tools, etc. The elastic shaped article whose component layers are particularly laminated by co-extrusion is molded by the blow molding method. When the plasticizer which is combined with polyvinyl chloride to form the soft polyvinyl chloride has an average molecular weight of at least 700, the produced elastic shaped article excels particularly in oil resistance at elevated temperatures.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: January 10, 1984
    Assignee: Kyoraku Co., Ltd.
    Inventors: Takehiko Sumi, Masao Harada, Yoshikazu Iwaya