Patents by Inventor Joseph E. Madsen

Joseph E. Madsen 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).

  • Apparatus for growing hollow crystalline bodies from the melt
    Patent number: 5398640
    Abstract: A single crystal dome is formed from a surface of revolution and grown from a liquid material on a linear die surface wettable by the molten material. A seed crystal is supported in a position spaced from an axis of revolution which lies in the plane of the wettable surface, and the seed crystal is rotated around the axis of revolution to generate a curved surface having a predetermined radius of curvature. The seed crystal is supported in a predetermined orientation of one of its axes with respect to the wetted surface of commencement of growth.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: March 21, 1995
    Assignee: Saphikon, Inc.
    Inventors: John W. Locher, Joseph E. Madsen