Patents by Inventor Heiichi Takei

Heiichi Takei 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).

  • Core material for fiber reinforced plastic and process for its production
    Patent number: 4481241
    Abstract: A core material for a fiber reinforced plastic comprises a glass fiber mat composed of glass fiber bundles and having a bulk density of from 50 to 150 kg/m.sup.3 and a porous material filled in void spaces in the glass fiber mat. The porous material is composed of a mixture of a thermoplastic resin and a filler such as a hollow inorganic filler.The core material is prepared by impregnating a glass fiber mat composed of elongated glass fiber bundles, with a mixture of the filler and a dispersion of the thermoplastic resin in a dispersing medium and their evaporating the dispersing medium from the impregnated glass fiber mat.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: November 6, 1984
    Assignee: Asahi Fiber Glass Company Limited
    Inventors: Sadao Kawashima, Heiichi Takei