Patents by Inventor Tatjana Berce

Tatjana Berce 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: 5447592
    Abstract: A process for glueing together two non-metallic substrates with a hot polymerizable adhesive wherein a ferromagnetic or ferrimagnetic filler material is distributed within the substrate and/or adhesive and the combination is subjected to induction heating by means of a magnetic field. The filler comprises particles having a defined size range, resistivity, coercive field and induced magnetic field such that the sum of the Foucault current losses and hysteresis losser permit the filler to provide power of 1000 to 10,000 W/cm.sup.3. The heating temperature is limited to about the maximum temperature of polymerization of the adhesive by fixing its duration to less than 60 seconds whereby the temperature of the adhesive/substrate interface is at least the minimum polymerization temperature.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: September 5, 1995
    Assignee: Battelle Memorial Institute
    Inventors: Tatjana Berce, Michel Kornmann, Jacques Vermot-Gaud, Guy Negaty-Hindi
  • Patent number: 5067554
    Abstract: The pool to be filamented is liquefied by heating in a crucible. A disk having an edge immersed in the molten pool rotates at high velocity and drives the pool outwards in the form of a ribbon which breaks up into pieces forming the required particles. The portion of the pool in contact with the disk is constantly replenished and, owing to the use of heating means, has sufficient fluidity to satisfy the conditions for extraction, the molten pool being continuously moved horizontally with respect to the disk.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: November 26, 1991
    Assignee: Battelle Development Corporation
    Inventors: Peter Bosswell, Dag Richter, Tatjana Berce, Guy Negaty-Hindi