Patents by Inventor Martin Selke

Martin Selke 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).

  • Crucible of fused vitreous silica
    Patent number: 4019645
    Abstract: A crucible of pure transparent silica glass or pure translucent or opaque silica glass for the production of monocrystals used in making semiconductor elements which includes a hollow cylindrical part and a welded-on head. The head end of the hollow cylindrical part is formed from a tube with a head margin portion constricted towards the tube axis which is formed by shaping one end of the tube. A plate is welded into the aperture formed by the constricted head margin portion and has an area equal to at least one-tenth and at most four-fifths of the total head area made up by the head margin portion and the head.
    Type: Grant
    Filed: December 3, 1973
    Date of Patent: April 26, 1977
    Assignee: Heraeus-Schott Quarzschmelze GmbH
    Inventors: Karl Seiler, Martin Selke, Oswald Siegling, Heinz Herzog, Horst Albrecht, Heinrich Mohn