Patents by Inventor Tsvetko Chobanov

Tsvetko Chobanov 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: 4447376
    Abstract: In the manufacture of cells, e.g. of the system Li-Al/LiCl-KCl/FeS.sub.x, the finely divided raw materials for the electrodes and for an included ceramic separator are respectively mixed individually with the electrolyte salt, as well as with a synthetic plastic which is decomposable without residue under heat. The mixtures are rolled into plates, and the plates are heated above the decomposition temperature of the plastic after assembly. The plastic is preferably a polyhydrocarbon such as polyisobutylene and is preferably introduced by means of a solvent. It makes the powder mixtures plastifiable and suitable for rolling. This makes it possible to produce ceramic separators, which are fundamentally composed only of loose particle accumulations, in the form of plates of uniform structure and strength and to handle these in the same way as electrode plates during cell assembly.
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: May 8, 1984
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Tsvetko Chobanov, Dieter Kunze, Friedrich Woeffler
  • Patent number: 4135041
    Abstract: Lead dust evolution from battery plates is reduced by applying a coating containing a silicate. Also plates so produced.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: January 16, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Margarete Jung, Ernst Voss, Tsvetko Chobanov
  • Patent number: 4003757
    Abstract: Silver-II-oxide for use in galvanic elements is produced by adding an oxidant to a metallic silver powder suspension in an alkaline solution.An exceptionally stable material results.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: January 18, 1977
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Walter Karl Lux, Tsvetko Chobanov