Patents by Inventor Louis Hemmerdinger

Louis Hemmerdinger 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 and apparatus for growth of single crystal material in space
    Patent number: 4704258
    Abstract: An ampoule assembly for the growth of single crystal materials is particularly adapted for a micro-gravity environment and includes a plurality of centering rods for spacing a crystalline material from the inner surface of an ampoule. The centering rods are spaced relative to one another to form a dopant vapor passageway to provide uniform stoichiometry of the crystal upon melting and resolidification. Minimum contact between ampoule and the crystalline material ensures greater purity of the crystalline material when the material is transformed into a single crystal.
    Type: Grant
    Filed: April 1, 1986
    Date of Patent: November 3, 1987
    Assignee: Grumman Aerospace Corporation
    Inventors: Louis Hemmerdinger, Herbert Schneider