Patents by Inventor Sigeyoshi Mathubara

Sigeyoshi Mathubara 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).

  • Process for producing multilayer molded article
    Patent number: 6183680
    Abstract: A multilayer molded article having a core layer and a skin material laminated on the core layer is produced by providing a skin material between a pair of upper and lower molds, supplying a thermoplastic resin melt between the skin material and one of the molds, closing the molds to press and form the resin melt while holding edges of the skin material with pins provided on a skin material-fixing frame which moves along an outer peripheral wall of one of the upper and lower molds, and cooling the molds and removing the multilayer molded article from the molds.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: February 6, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takahisa Hara, Masahito Matsumoto, Nobuhiro Usui, Sigeyoshi Mathubara