Patents by Inventor Yukio Terakawa

Yukio Terakawa 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: 5500455
    Abstract: A correction fluid composition of the present invention comprises an acrylic synthetic resin obtained by copolymerizing 93 to 99.6% by weight of a (meth)acrylate represented by the formula (I) ##STR1## (wherein R.sup.1 is hydrogen or a methyl group, and R.sup.2 is an aliphatic hydrocarbon group, a cyclic aliphatic hydrocarbon group or a partially aromatic group-substituted aliphatic hydrocarbon group having 1 to 18 carbon atoms)and not less than 0.4% by weight to less than 2% by weight of a basic nitrogen-containing monomer represented by the formula (II) ##STR2## (wherein R.sup.3 is hydrogen or a methyl group; each of R.sup.4 and R.sup.5 is independently a methyl group or an ethyl group; and A is an alkylene group having 1 to 4 carbon atoms) and if necessary, 5% by weight or less of a styrene monomer; a pigment containing titanium dioxide as the main component; and a non-polar solvent.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: March 19, 1996
    Assignee: Mitsubishi Pencil Kabushiki Kaisha
    Inventor: Yukio Terakawa
  • Patent number: 4189414
    Abstract: Novel coating compositions for architectural use are provided, which include a quaternary ammonium silicate having a silica content of 10 to 60% by weight and a liquid epoxide resin, besides the conventional ingredients, such as pigments, fillers, aggregates and water, and which are particularly capable of producing films having excellent adherency to mortar or concrete surfaces. If a stabilized silica sol is added to the compositions, films produced therefrom have much improved resistance to water at low temperatures as well as freeze-thaw stability.
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: February 19, 1980
    Assignee: Kowa Chemical Industry Ltd.
    Inventors: Kiyoshi Kikuchi, Takeo Okano, Yukio Terakawa, Akira Nishihara, Koji Kono
  • Patent number: 4057525
    Abstract: A novel stable silica sol which does not gel even at low temperatures is prepared by adding a di -or polyhydric alcohol having three or more carbon atoms and a water-soluble melamine resin to a silica sol. A novel water-based coating composition which requires only an applying step, not a baking step nor a drying step, in the use is prepared by adding an aggregate or filler and usual additives for coating material to the aforesaid stable silica sol as binder. By adding further a small amount of a synthetic resin emulsion to said binder, an inorganic coating composition containing a smaller amount of organic materials than that in prior products can be obtained. The coating therefrom is excellent in strength and its fire resistance is not lowered.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: November 8, 1977
    Assignee: Kowa Chemical Industry Ltd.
    Inventors: Kiyoshi Kikuchi, Takeo Okano, Yukio Terakawa, Akira Nishihara