Patents by Inventor Tadanobu Iwasa

Tadanobu Iwasa 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).

  • Rubber adhesive
    Patent number: 4686122
    Abstract: There is provided a rubber adhesive for bonding rubber to metal or synthetic resin. The rubber adhesive comprises a chlorinated polymer as a principal component and a dithiocarbamate. The dithiocarbamate is, for example, nickel dibutyldithiocarbamate, which is added in amount of 0.5 to 20 parts by weight, preferably 4 to 16 parts by weight, for 100 parts by weight of solids in the principal component.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: August 11, 1987
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Tadanobu Iwasa, Hiroshi Yokoi
  • Wiper blade rubber
    Patent number: 4638525
    Abstract: A wiper blade rubber is disclosed. The wiper blade rubber comprises a matrix formed of rubber made preponderantly of EPDM and vulcanized with a peroxide and a lip part having the portions thereof for sliding contact with the outer surface of a wind shield formed of chlorinated diene type rubber. The lip part has the opposite lateral sides in the direction of thickness of the leading end thereof formed of diene type rubber containing a chlorinated layer on the surface thereof, with the matrix exposed to sight at the leading edge of the lip part between the opposite lateral sides of diene type rubber. The diene type rubber in each of the opposite lateral sides has the outer surface thereof chlorinated.
    Type: Grant
    Filed: July 23, 1985
    Date of Patent: January 27, 1987
    Assignee: Toyoda Goseki Co., Ltd.
    Inventors: Hiroshi Sugita, Tadanobu Iwasa, Takemasa Yasukawa, Masanori Aritake
  • Weather strip
    Patent number: 4603899
    Abstract: A weather strip comprises a main body having a water passage for draining rainwater, etc. and a water flow promoting member or members forming an integral part of the main body, provided in the water passage and containing a hydrophilic material. The main body is formed from EPDM rubber. The hydrophilic material is a hydrophilic polymer having good compatibility with the EPDM rubber. The water flow promoting member is bonded by vulcanization to the main body.
    Type: Grant
    Filed: July 29, 1985
    Date of Patent: August 5, 1986
    Assignee: Toyoda Gosei Co., Ltd.
    Inventor: Tadanobu Iwasa
  • Weather resisting extruded rubbery articles having on the surface thereof a thin layer of a colored rubbery material
    Patent number: 4442167
    Abstract: A weather-resisting extruded rubbery article based on carbon black-incorporated EPDM rubber substrate having on the surface thereof a thin layer of a colored rubbery material of a smooth or suede-like appearance integrally formed on the substrate by extrusion molding, characterized in that the colored rubbery material has been derived from 75-0% by weight of EPDM and 25-100% by weight of a graft copolymer of EPDM and vinyl chloride together with one or more coloring fillers.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: April 10, 1984
    Assignee: Toyoda Gosei Kabushiki Kaisha
    Inventors: Tadanobu Iwasa, Mituo Ushida