Patents by Inventor Mansei Tanaka

Mansei Tanaka 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).

  • Precoated corrosion-resistant steel pipe piles for marine use, and structure thereof
    Patent number: 4743142
    Abstract: Precoated corrosion-resistant steel pipe piles, and structures thereof, for driving into the sea bed wherein the waterproofness, corrosion resistance, and scratch resistance of the steel pipe piles are considerably improved by applying a polyethylene resin over the length thereof.
    Type: Grant
    Filed: June 10, 1986
    Date of Patent: May 10, 1988
    Assignee: Nippon Steel Corporation
    Inventors: Motoo Shiraishi, Mansei Tanaka, Minoru Nakamura, Koichi Sato
  • Marine structure of precoated corrosion resistant steel pipe piles
    Patent number: 4659255
    Abstract: A marine structure comprising steel pipe piles in which the top head, splash zone and tidal zone of each steel pipe pile driven into the sea bed are covered with a polyethylene resinous covering material, and the top head of the steel pipe pile is inserted inside a slab concrete structure, whereby is realized a considerably improvement in the water imperviousness, corrosion resistance, and scratch resistance of the steel pipe piles.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: April 21, 1987
    Assignee: Nippon Steel Corporation
    Inventors: Motoo Shiraishi, Mansei Tanaka, Minoru Nakamura, Koichi Sato
  • Polypropylene coated steel pipe
    Patent number: 4606953
    Abstract: A polypropylene coated steel pipe comprising a steel pipe, an adhesive layer coated on the external surface of the steel pipe, which has been subjected to a pretreatment, and a polypropylene layer coated on the adhesive layer. The outermost polypropylene layer comprises, as a main constituent, a crystalline ethylene-propylene block copolymer and the adhesive layer comprises a modified polyolefin adhesive.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: August 19, 1986
    Assignee: Nippon Steel Corporation
    Inventors: Kazuyuki Suzuki, Masami Ishida, Fuyuhiko Ohtsuki, Yoshihiro Inuizawa, Saburo Hinenoya, Mansei Tanaka, Yoshio Shindou
  • Apparatus for manufacturing a metallic tube coated with a thermoplastic resin film having little residual strain
    Patent number: 4077098
    Abstract: A steel pipe is coated with resin at high temperature. After the temperature is lowered slightly below the softening point of the resin, the coated pipe is cut to length and then allowed to be cooled down to an ordinary temperature, meanwhile the resin is freely shrunk, leaving little residual strain in the cooled product coating.A cooling means for cooling the coating from the middle toward the ends in its longitudinal direction and a means for cooling the coating forcibly are provided.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: March 7, 1978
    Assignee: Nippon Steel Corporation
    Inventors: Saburo Ayusawa, Mansei Tanaka