Patents by Inventor Saburo Nakahara

Saburo Nakahara 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: 5863647
    Abstract: A monodispersed glycol suspension having excellent dispersion stability at a pH within a wide range, comprising a monodispersed suspension in a glycol of spherical fine particles of an amorphous inorganic oxide having an average particle diameter of 0.15 to 5 micrometers and a relative particle size standard deviation of 1.0 to 1.5 and containing glycol bonded to its surface in amounts of 0.003 to 5 millimoles glycol, per gram of fine particles. This monodispersed suspension is useful as a raw material for the production of a polyester film having improved slipperiness.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: January 26, 1999
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tadahiro Yoneda, Saburo Nakahara, Mitsuo Takeda, Midori Kamo
  • Patent number: 5316714
    Abstract: A monodispersed glycol suspension having excellent dispersion stability, including a monodispersed suspension in a glycol of spherical fine particles of an amorphous inorganic oxide having an average particle diameter of 0.05 to 5 micrometers and a relative particle size standard deviation of 1.0 to 1.5 and containing glycol bonded to its surface. This monodispersed suspension is useful as a raw material for the production of a polyester film having improved slipperiness.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: May 31, 1994
    Assignee: Nippon Shokujai Kagaku Kogyo Co., Ltd.
    Inventors: Tadahiro Yoneda, Saburo Nakahara, Mitsuo Takeda, Midori Kamo
  • Patent number: 5304324
    Abstract: A monodispersed glycol suspension having excellent dispersion stability at a pH within a wide range, comprising a monodispersed suspension in a glycol of spherical fine particles of an amorphous inorganic oxide having an average particle diameter of 0.15 to 5 micrometers and a relative particle size standard deviation of 1.0 to 1.5 and containing glycol bonded to its surface. This monodispersed suspension is useful as a raw material for the production of a polyester film having improved slipperiness.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: April 19, 1994
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Tadahiro Yoneda, Saburo Nakahara, Mitsuo Takeda, Midori Kamo
  • Patent number: 5288790
    Abstract: Spherical fine particles of colored resin are provided. The fine particles are of a spherical shape and are superior in heat resistance, solvent resistance, and chemical resistance, and sufficiently satisfactory in durability and coloring, and industrially advantageous. The spherical fine particles of colored resin are made by incorporating an amino resin cured matter and an inorganic pigment into one body, and a ratio of the inorganic pigment against a total amount of the amino resin cured matter and inorganic pigment is in a range of from about 1 to 30% by weight.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: February 22, 1994
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Saburo Nakahara, Yasuhiro Yamamoto, Yohji Akazawa, Masao Baba, Yoshikuni Mori
  • Patent number: 5236622
    Abstract: A monodispersed glycol suspension having excellent dispersion stability at a pH within a wide range, comprising a monodispersed suspension in a glycol of spherical fine particles of an amorphous inorganic oxide having an average particle diameter of 0.15 to 5 micrometers and a relative particle size standard deviation of 1.0 to 1.5 and containing glycol bonded to its surface. This monodispersed suspension is useful as a raw material for the production of a polyester film having improved slipperiness.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: August 17, 1993
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Tadahiro Yoneda, Saburo Nakahara, Mitsuo Takeda, Midori Kamo
  • Patent number: 5139980
    Abstract: A method for the production of inorganic oxide particles by a procedure comprising the steps of dispersing inorganic oxide particles as seed particles in a water-containing alcohol solution thereby preparing a suspension of said seed particles and adding a hydrolyzable and condensable organic metal compound to said suspension thereby effecting growth of said seed particles, which method further comprises causing the presence in said water-containing alcohol solution of an alkylene glycol having 2-8 carbon atoms, in an amount in the range of 1 to 50% by weight, based on the amount of said water-containing alcohol solution.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: August 18, 1992
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Saburo Nakahara, Takahiro Takeda, Mitsuo Takeda, Youji Akazawa, Tadahiro Yoneda
  • Patent number: 4309300
    Abstract: The surfaces of organic polymeric coatings applied to detail parts or components are subject to contamination and ultraviolet degradation prior to final overcoating procedures. The sources of ultraviolet exposure are light transmission through windows, artificial lighting, or temporary exterior exposure of the detail part coated surface. The ultraviolet light altered surface layer is effectively removed by treatment with a mixture of a glycol ether, an alcohol, a ketone and deionized water, without removing the main body of the coating. This results in good adhesion of a subsequently applied touch-up coating or overcoating. The process can also be used for cleaning metals.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: January 5, 1982
    Assignee: McDonnell Douglas Corporation
    Inventors: Mervin A. Danforth, Julian Giles, Saburo Nakahara