Patents by Inventor James R. Rapp

James R. Rapp 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).

  • Glass-ceramics and process for making same
    Patent number: 4017317
    Abstract: Thermally crystallizable glasses of the Na.sub.2 O--Ta.sub.2 O.sub.5 --SiO.sub.2 and the Na.sub.2 O--Li.sub.2 O--Ta.sub.2 O.sub.5 -SiO.sub.2 systems, and glass-ceramics made therefrom which are highly transparent, have high indices of refraction, and excellent strength properties. By varying the heat treatment schedule for crystallization of a glass to a glass-ceramic, a specific high index of refraction coming within a prescribed range may be imparted to the finished transparent glass-ceramic. A transparent glass-ceramic having two or more different indices of refraction may also be produced.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: April 12, 1977
    Assignee: Owens-Illinois, Inc.
    Inventor: James R. Rapp