Patents by Inventor Masataka Sasayama

Masataka Sasayama 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).

  • Ethylene propylene rubber composition
    Patent number: 5231128
    Abstract: An ethylene propylene rubber composition is disclosed, comprising 100 parts by weight of a polymer component, at least 5 parts by weight of a softener, and a hydrated magnesium silicate-based clay mineral in an amount of from 0.05 to 0.5 times the weight of said softener. The rubber composition provides a molded article free from bleeding of softeners.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: July 27, 1993
    Assignees: Toyoda Gosei Co., Ltd., Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Rikizou Nakata, Masataka Sasayama, Hidenori Hayashi, Takayoshi Saiki, Mitsumasa Horii, Masahiro Sugiura
  • Rubber composition for producing sponge rubber product
    Patent number: 4866101
    Abstract: A rubber composition for producing sponge rubber products which comprises 1 to 20 parts by weight of a blowing agent and 0.1 to 0.8 part by weight of sulfur relative to 100 parts by weight of an ethylene-.alpha.-olefin-non-conjugated dienes tetrapolymer containing as non-conjugated dienes the ethylidene-norbornene component amounting to 15 to 30 in terms of iodine value and the dicyclopentadiene component amounting to 1 to 10 in terms of iodine value and having a branching index of at least 2.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: September 12, 1989
    Assignees: Sumitomo Chemical Company, Limited, Toyoda Gosei Co., Ltd.
    Inventors: Tadanobu Iwasa, Masataka Sasayama, Masaki Ohashi, Isao Kurimoto