Patents by Inventor Shigeji Nakamura

Shigeji Nakamura 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).

  • Objects of marble-like glass ceramic
    Patent number: 3964917
    Abstract: Objects of marble-like glass ceramic are readily obtained from a thermally crystallizable composition consisting essentially of 50% - 65% SiO.sub.2, 3% - 13% Al.sub.2 O.sub.3, 15% - 25% CaO, and 2% - 10% ZnO when heat treated to convert at least a portion of the surface layer to crystals of .beta.-wollastonite.
    Type: Grant
    Filed: January 2, 1975
    Date of Patent: June 22, 1976
    Assignee: Nippon Electric Glass Company, Limited
    Inventor: Shigeji Nakamura