Patents by Inventor Toshihiko Nakamichi

Toshihiko Nakamichi 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).

  • Aqueous cutting fluid, aqueous cutting agent, and process for cutting hard brittle materials with the same
    Patent number: 6228816
    Abstract: An aqueous cutting liquid comprises a cationic water-soluble resin having an amine value of 20 to 200 mgKOH/g, and at least one rheology control agent selected from the group consisting of an inorganic bentonite, an organic bentonite and an aqueous silica sol, wherein the content of a nonvolatile matter of the rheology control agent is 0.1 to 30 percent by weight of the amount of the nonvolatile matter of the cationic water-soluble resin. An aqueous cutting agent comprises the aqueous cutting liquid, and an abrasive grain, wherein the content of the abrasive grain is 100 to 1000 percent by weight of the amount of the nonvolatile matter of the aqueous cutting liquid. A hard and brittle material is cut by a cutting device using the aqueous cutting agent.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: May 8, 2001
    Assignees: NOF Corporation, Fujimi Incorporated
    Inventors: Kenji Ito, Shunji Maemichi, Hutoshi Nakanishi, Masahiro Ishidoya, Takashi Tanaka, Toshihiko Nakamichi, Kazuyuki Mori, Shigehiro Hayashi, Hideki Yokoyama
  • Method for the preparation of chromatic-color metal flake pigments
    Patent number: 5213618
    Abstract: A titanium oxide-coated chromatic-color metal flake pigment is prepared by hydrolyzing an organic titanate ester compound, e.g., tetraisopropoxy titanium, in the presence of the base metal flakes suspended in an organic medium having a pH of 4 to 8. The pigment exhibits iridescent color tones of great aesthetic value delicately varying depending on the thickness of the titanium oxide coating layer. The pigment has high chemical stability, for example, against acids, by virtue of the very uniform and dense coating layer of titanium oxide so that the inventive pigment is useful as a coloring agent in a water-borne composition.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Nippon Oil and Fats Company, Limited
    Inventors: Thoru Souma, Masahiro Ishidoya, Toshihiko Nakamichi, Naoe Takai
  • Chromatic-color metal flake pigment and colored composition compounded therewith
    Patent number: 5091010
    Abstract: A titanium oxide-coated chromatic-color metal flake pigment is prepared by hydrolyzing an organic titanate ester compound, e.g., tetraisopropoxy titanium, in the presence of the base metal flakes suspended in an organic medium having a pH of 4 to 8. The pigment exhibits iridescent color tones of great aesthetic value delicately varying depending on the thickness of the titanium oxide coating layer. The pigment has high chemical stability, for example, against acids, by virtue of the very uniform and dense coating layer of titanium oxide so that the inventive pigment is useful as a coloring agent in a water-borne composition. Application fields of the inventive pigment include colored coating compositions, ink compositions, cosmetic preparations, molding compounds of plastic resins and so on.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: February 25, 1992
    Assignee: Nippon Oil and Fats Company, Limited
    Inventors: Thoru Souma, Masahiro Ishidoya, Toshihiko Nakamichi, Naoe Takai