Patents by Inventor Eizi Ando

Eizi Ando 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).

  • Method for production of mullite of high purity
    Patent number: 4774068
    Abstract: Mullite of high purity is obtained by neutralizing an aqueous solution containing a basic aluminum salt and colloidal silica thereby causing formation of a precipitate in the aqueous solution, and subsequently heating the precipitate.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: September 27, 1988
    Assignee: Showa Denko K. K.
    Inventors: Tadashi Hiraiwa, Eizi Ando, Kunihiro Miyazaki
  • Method for dehydration of a composition of a fine powder and water
    Patent number: 4686774
    Abstract: From a composition of a fine powder and water, a fine powder minimally susceptible of agglomeration is obtained by a method which comprises adding to the composition of a fine powder and water a water-insoluble organic solvent at least in an amount enough for consequently forming an azeotropic composition with respect to the amount of the water involved, converting the resulting mixed liquid into a W/O type emulsion, and removing the water and the organic solvent from the emulsion.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: August 18, 1987
    Assignee: Showa Denko K.K.
    Inventors: Tadashi Hiraiwa, Eizi Ando