Patents by Inventor Masao Miyadai

Masao Miyadai 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).

  • Light-storing glazes and light-storing fluorescent ceramic articles
    Patent number: 4963441
    Abstract: A light-storing glaze comprising (a) a mixture of base components for a frit consisting of: per 100 parts by weight of the mixture (a), about 10 to about 50 parts by weight of B.sub.2 O.sub.3, about 1 to about 20 parts by weight of Al.sub.2 O.sub.3, 0 to about 10 parts by weight of ZnO, about 2 to about 15 parts by weight of Na.sub.2 O, 0 to about 60 parts by weight of SiO.sub.2, 0 to about 15 parts by weight of CaO, 0 to about 5 parts by weight of K.sub.2 O and 0 to about 5 parts by weight of MgO, and (b) about 20 to about 80 parts by weight of sulphide-type light-storing fluorescent material per 100 parts by weight of the mixture (a), and a light-storing fluorescent ceramic article having a surface coated with such glaze.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: October 16, 1990
    Assignee: Shiga Prefecture
    Inventors: Ryuzo Takai, Masao Miyadai