Patents by Inventor Sybille von Tomkewitsch

Sybille von Tomkewitsch 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).

  • Patent number: 4853252
    Abstract: A method and coating material for applying electrically conductive printed patterns to insulating substrates is provided. The coating material includes a non-metallic, grainy carrier substance having metal of the oxidation degree 0 applied thereto. An energy radiation source, particularly of a deflectable laser beam, is used to secure anchoring of the carrier substance to the substrate in the region of the desired printed pattern. As a consequence of a three-dimensional arrangement of the metal, a three-dimensional nuclei distribution is produced that leads to a reliable and fast metallization of the printed pattern on the basis of chemical metal deposition. The method of the invention is especially suited for laser pattern transfer for the manufacture of printed circuit boards.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: August 1, 1989
    Assignees: Siemens Aktiengesellschaft, Michael Huber GmbH
    Inventors: Juergen Frankel, Antoon Mattelin, Pol Pecceu, Ferdinand Quella, Hans-Fr. Schmidt, Luc Boone, Sybille Von Tomkewitsch, Marc De Vogelaere
  • Patent number: 4802061
    Abstract: In microelectronic components and thick-film hybrid circuits, the multilayer substrates of the said components and the substrates of the said circuits are produced using liquid crystalline polymers which can be processed by a thermoplastic method.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: January 31, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Portugall, Hans-Josef Sterzel, Gerd Blinne, Heinz-Dieter Vondenhagen, Erhard Seiler, Hans-Friedrich Schmidt, Sybille Von Tomkewitsch
  • Patent number: 4548740
    Abstract: Conductive plastic parts having defined electrical properties within a relatively narrow range are produced by controlling the dosage relationship between a given plastic and a conductive material, such as long-chain conductive lampblack, as a function of an electrical value (i.e., surface resistance) measured at an extruded admixture of the plastic and conductive materials, rather than by a gravimetrical or volumetrical relation.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: October 22, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventors: Sybille von Tomkewitsch, Hans-Friedrich Schmidt