Patents by Inventor Burkhardt Danielzik

Burkhardt Danielzik 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 a hollow, interiorly coated glass body and a glass tube as a semi-finished product for forming the glass body
    Patent number: 6200658
    Abstract: Numerous applications for hollow glass bodies made from low melting glass material require an increase in the chemical resistance of the interior surface of the glass body. In order to avoid a disadvantageous de-alkalizing process the hollow glass body must be provided with an interior coating in a comparatively expensive prior art process. In an improved process according to the invention a glass tube acting as a semifinished product from which the hollow glass body is made is provided with an interior coating of oxide material, preferably SiO2, Al2O3, TiO2 or mixtures thereof, having a predetermined coating thickness according to the required chemical resistance or working conditions for forming the glass body and then the hollow glass body is made from the glass tube. The coating is advantageously provided by means of a PICVD process.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: March 13, 2001
    Assignee: Schott Glas
    Inventors: Marten Walther, Michael Spallek, Burkhardt Danielzik, Martin Heming, Johannes Segner