Patents by Inventor Takasi Nakayama

Takasi Nakayama 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).

  • Micro-powdery stain composition for unsaturated polyester resin, unsaturated polyester resin composition and production process therefor
    Patent number: 6191198
    Abstract: The present invention provides: a stain composition for an unsaturated polyester resin, and an unsaturated polyester resin composition, both of which have excellent conservation stability without problems of the gelation, the viscosity increase, the sinking, the color separation, and so on; and further a production process for the unsaturated polyester resin composition. The micro-powdery stain composition for an unsaturated polyester resin comprises either or both of a pigment and an oil-soluble dye as well as a resin, and is characterized in that the resin as included in the composition is at least one resin selected from the group consisting of polystyrene, low molecular polystyrene, low molecular acrylstyrene and low molecular acryl.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: February 20, 2001
    Assignee: Sumika Color Company, Limited
    Inventors: Eizo Hamahira, Takasi Nakayama