Patents by Inventor Tatsuhiro Takahashi

Tatsuhiro Takahashi 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).

  • Toughened thermoplastic polymer compositions
    Patent number: 5817723
    Abstract: A toughened thermoplastic polymer composition comprising (a) 1-30 weight percent of a polar toughening agent compatibilized with a polyphenol, and (b) 70-99 weight percent of at least one thermoplastic polymer, the above state percentages being based on the total weight of components (a) and (b) only.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: October 6, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Edmund Arthur Flexman, Jr., Tatsuhiro Takahashi, Toshikazu Kobayashi
  • Polyacetal compositions for use in wear applications
    Patent number: 5559180
    Abstract: A polyacetal composition is provided for use in plastic-plastic wear applications, said composition containing about 85 to 99 weight percent polyacetal, about 0 to 5 weight percent polytetrafluoroethylene fibers, about 0.5 to 5 weight percent ethylene methyl acrylate copolymer, and about 0.5 to 5 weight percent of at least one lubricant. The compositions are particularly useful in forming shaped articles for use especially in conveyor chain applications and gear applications.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: September 24, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Tatsuhiro Takahashi, Edmund A. Flexman, Robert J. Kassal
  • Polyacetal resin composition
    Patent number: 5418286
    Abstract: Incorporation into polyacetal of 0.01-15 weight percent of certain epoxy-containing polymer compounds, oxazolyl-containing monomer and polymer compounds, and/or styrene acrylonitrile graft polymer compounds yields polyacetal compositions having excellent tensile strength after long-term aging and also after long-term aging in grease. The compositions are useful in automotive and electrical/electronic applications.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: May 23, 1995
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Tatsuhiro Takahashi, Toshikazu Kobayashi