Patents by Inventor Etsuji Okumura

Etsuji Okumura 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).

  • Thermoplastic resin composition having improved resistance to discoloration from sunlight
    Patent number: 5296533
    Abstract: A resin composition having improved resistance to discoloration by sunlight comprising (A) a polymer mixture which comprises a polyphenylene ether, a polyamide and optionally a polystyrene and/or an agent to improve the impact resistance, and (B) an inorganic powder whose mean particle size is less than or equql to 5 micrometer, in an amount of more than or equal to 15 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A), which is selected from the group consisting of titanium oxide, mica coated with titanium oxide, barium sulphate, zinc oxide and zinc sulfide.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: March 22, 1994
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kenji Nagaoka, Hiroshi Hagimori, Yasurou Suzuki, Takashi Sanada, Etsuji Okumura