Patents by Inventor Yoshiji Hiraoka

Yoshiji Hiraoka 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: 4714650
    Abstract: A stainproof, flame-resistant composite sheet material including at least one silicone polymer layer containing a silicon resin or rubber and optionally a flame-resistant inorganic filler and at least one stainproof surface layer containing at least one synthetic thermoplastic stain-resistant, weathering-resistant polymeric material, the silicone polymer layer and the stainproof surface layer being bonded optionally through an adhesive material, a cold plasma or corona discharge-modified surface portion of the silicone polymer layer or a cold plasma or corona discharge-modified and graft polymerization-modified surface portion of the silicone polymer layer.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: December 22, 1987
    Assignee: Hiraoka & Co., Ltd.
    Inventors: Tsutomu Obayashi, Kazuhide Ino, Yoshiji Hiraoka, Saburo Baba
  • Patent number: 4686135
    Abstract: A stainproof, flame-resistant composite sheet material including at least one silicone polymer layer containing a silicone resin or rubber and optionally a flame-resistant inorganic filler and at least one stainproof surface layer containing at least one synthetic thermoplastic stain-resistant, weathering-resistant polymeric material, the silicone polymer layer and the stainproof surface layer being bonded optionally through an adhesive material, a cold plasma or corona discharge-modified surface portion of the silicone polymer layer or a cold plasma or corona discharge-modified and graft polymerization-modified surface portion of the silicone polymer layer.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: August 11, 1987
    Assignee: Hiraoka & Co., Ltd.
    Inventors: Tsutomu Obayashi, Kazuhide Ino, Yoshiji Hiraoka, Saburo Baba
  • Patent number: 4312907
    Abstract: A water-impermeable sheet material capable of preventing formation of water drops thereon, has one or two water-impermeable layers, at least one of which layers holds, on the surface thereof, a water drop-preventing agent in the form of fine solid particles and consisting of at least one hydrophilic but water-insoluble substance, at least a portion of the water drop-preventing agent being exposed to the ambient atmosphere.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: January 26, 1982
    Assignee: Hiraoka & Co. Ltd.
    Inventors: Yoshiji Hiraoka, Tsutomu Obayashi
  • Patent number: D253013
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: September 25, 1979
    Inventor: Yoshiji Hiraoka