Patents by Inventor Ivanka Atanasova-Hoehlein

Ivanka Atanasova-Hoehlein 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: 8293320
    Abstract: The conductor, including the points being kept free insulation, is initially surrounded by a liquid, electrically non-conducting bonding agent which forms the insulation after solidifying. The conductor can be a transposed conductor in which the individual conductors thereof are electrically isolated relative to each other and are interconnected by the bonding agent. Using a liquid stripping agent based on a polyvinyl alcohol or a long-chain hydrocarbon mixture and a polysaccharide filler on the point of the conductor being kept free of the insulation locally prevents the bonding agent from bonding to the conductor or the individual conductors of the transposed conductor from being interconnected by means of the unsolidified mixture. Once the entire bonding agent is hard and thus the bonding agent/stripping agent mixture has solidified, the bonding agent/stripping agent mixture can easily be removed in a mechanical manner from the treated points of the conductor.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: October 23, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ivanka Atanasova-Hoehlein, Ulrich Duellberg, Peter Heinzig, Bogdan Kokotowski, Konrad Unterlugauer
  • Publication number: 20120076926
    Abstract: The conductor, including the points being kept free insulation, is initially surrounded by a liquid, electrically non-conducting bonding agent which forms the insulation after solidifying. The conductor can be a transposed conductor in which the individual conductors thereof are electrically isolated relative to each other and are interconnected by the bonding agent. Using a liquid stripping agent based on a polyvinyl alcohol or a long-chain hydrocarbon mixture and a polysaccharide filler on the point of the conductor being kept free of the insulation locally prevents the bonding agent from bonding to the conductor or the individual conductors of the transposed conductor from being interconnected by means of the unsolidified mixture. Once the entire bonding agent is hard and thus the bonding agent/stripping agent mixture has solidified, the bonding agent/stripping agent mixture can easily be removed in a mechanical manner from the treated points of the conductor.
    Type: Application
    Filed: December 7, 2011
    Publication date: March 29, 2012
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Ivanka ATANASOVA-HÖHLEIN, Ulrich DÜLLBERG, Peter HEINZIG, Bogdan KOKOTOWSKI, Konrad UNTERLUGAUER
  • Publication number: 20110220552
    Abstract: A method removes corrosive sulfur compounds from transformer oil. By adding a mixture of rare earths containing aluminum oxide and aluminum silicate to the transformer oil, and enriching the same with an aqueous solution of soluble metal salts, the corrosive sulfur compounds in the transformer oil are neutralized with defined heating and cooling phases. Advantageously, no additional chemical components, such as passivators, are added to the transformer oil. When using a tank for receiving the mixture of the rare earths containing aluminum oxide and aluminum silicate, the reaction can run in the tank. Any aging products that may be present, and the bonded corrosive sulfur compounds are effectively retained within the tank by a filter system, and can be disposed of with the tank.
    Type: Application
    Filed: October 20, 2008
    Publication date: September 15, 2011
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Ivanka Atanasova-Hoehlein, Peter Heinzig, Vladyslav Mezhvynskiy, Uwe Thiess