Patents by Inventor Kensaku Maruyama

Kensaku Maruyama 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).

  • Process for preparing metal carbides and precursors thereof
    Patent number: 4752456
    Abstract: A carbon-containing mixture is obtained by collecting a dispersed phase mixture from an aerosol which has been formed by introducing a decomposable carbon compound and a decomposable metallic compound into a hot gas containing steam.Since this carbon-containing mixture is extremely high in uniformity and consists of extremely fine particles, it can afford after heat treatment a metal carbide of high quality.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: June 21, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yukihiro Yoda, Makoto Horita, Kensaku Maruyama, Hideaki Miyashita, Norihiro Murakawa, Kazuyoshi Isogaya, Fumio Nakamura, Norimasa Kawamura, Noriaki Kuramitsu
  • Process for producing sialon
    Patent number: 4731236
    Abstract: A process for producing a sialon powder, which process comprises the steps of:introducing a decomposable silicon compound, decomposable aluminum compound and a decomposable carbon compound into a steam-containing hot gas to decompose said decomposable silicon compound, aluminum compound and carbon compound in said hot gas into silicon oxide, aluminum oxide and elemental carbon, respectively, thereby producing a fine solid particle mixture consisting essentially of said silicon oxide, aluminum oxide and elemental carbon to be dispersed in said gas;collecting said fine solid particle mixture dispersed in the gas from the gas phase by a solid-gas separating technique; andcalcining the thus-obtained carbon-containing composition consisting essentially of said silicon oxide, aluminum oxide and elemental carbon, in a nitrogen containing gas atmosphere.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: March 15, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Norihiro Murakawa, Kazuyoshi Isogaya, Kensaku Maruyama, Fumio Nakamura
  • Fine particulate crystalline aluminum orthophosphate and method for preparing same
    Patent number: 4542001
    Abstract: A fine particulate crystalline aluminum orthophosphate is obtained by reacting an aqueous phosphoric acid solution with an aluminum oxide under heating in an organic solvent which is incompatible with water.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: September 17, 1985
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shinji Iino, Kensaku Maruyama, Motoi Takenaga, Kazuhiko Muramoto, Mitsutomo Tsuhako
  • Process for preparing apatite
    Patent number: 4481175
    Abstract: A calcium-phosphorus apatite is obtained by reacting a calcium compound with a phosphorus compound under reflux in a reaction medium consisting mainly of an organic solvent and water.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: November 6, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shinji Iino, Akihiko Nakamura, Kensaku Maruyama, Kohji Nakamura