Patents by Inventor Mitsugu Yamanaka

Mitsugu Yamanaka 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 synthesizing a composite oxide by citrating process
    Patent number: 5168095
    Abstract: A composite oxide synthesized by a citrating process and utilized in functional ceramics materials is prepared by the following process. Co-precipitants or mixtures of at least one component selected from the group consisting of carbonates, basic copper and/or hydroxides of elements which compose a composite oxide are reacted with citric acid in an aqueous solution or in an organic solvent. The elements are selected from at least one element of the group consisting of Y, rare earth elements, transition elements, and alkali metal or alkaline earth metal elements. The citrate compound formed is baked to complete the composite oxide.The composite oxide synthesized by this invention has superconduction at the most temperature of 93.degree. K. with excellent Meissner effect.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: December 1, 1992
    Assignees: Nissan Motor Company Ltd., Seimi Chemical Co. Ltd.
    Inventors: Fumio Munakata, Mitsugu Yamanaka, Susumu Hiyama