Patents by Inventor John L. Schrader, Jr.

John L. Schrader, Jr. 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 of making silicon nitride
    Patent number: 4731235
    Abstract: In the manufacture of silicon nitride powder by the vapor phase reaction of a silicon halide with ammonia at an elevated temperature in a flowing system, oxygen content of the silicon nitride is controlled by preventing entry of room air into the reaction means and by feeding wet nitrogen into the system at about the exit end of the reaction means.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: March 15, 1988
    Assignee: GTE Products Corporation
    Inventors: John L. Schrader, Jr., Patience G. Dowd