Patents by Inventor Takayoshi Nagata

Takayoshi Nagata 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).

  • Patent number: 4580609
    Abstract: A tire having a tread, wherein a polymer component in the rubber composition constituting the tread comprises at least 30% by weight of a specific styrene-butadiene rubber produced by solution polymerization (S-SBR), and wherein the pattern of the tread has a specific contact area ratio, lateral groove density and lateral siping density is suitable for an all-season tire having high-wet grip properties, low rolling resistance, excellent low-temperature characteristics, and excellent on-ice and on-snow performance at a highly balanced level and with no sacrifice whatsoever of abrasion resisting characteristics.
    Type: Grant
    Filed: August 14, 1984
    Date of Patent: April 8, 1986
    Assignee: Toyo Tire and Rubber Company Limited
    Inventors: Takayoshi Nagata, Mitsuaki Hashiyama
  • Patent number: 4548980
    Abstract: A rubber composition, comprising from 20 to 150 parts by weight of carbon black incorporated in 100 parts by weight of rubber, said carbon black being a furnace carbon black having (1) a specific surface area (N.sub.2 SA) within the range of 75 to 105 as measured by the nitrogen adsorption technique, (2) the difference between said N.sub.2 SA value and the measured iodine adsorption (IA) being at least 15 (N.sub.2 SA-IA.gtoreq.15) and (3) the difference between said N.sub.2 SA value and the measured surface by the cetyltrimethylammonium bromide technique (CTAB) being not greater than 5 (N.sub.2 SA-CTAB.ltoreq.5), said furnace carbon black further having a dibutyl phthalate adsorption value (24M4 DBP) of not greater than 110 (ml/100 g) and a tinting strength (Tint) of 90 to 110, said carbon black having a storage elastic modulus E' of not greater than 12.5 MPa as specified by the ASTM-D 3191 method for carbon blacks.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: October 22, 1985
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventors: Takayoshi Nagata, Mitsuaki Hashiyama