Patents by Inventor Eliane Charles

Eliane Charles 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 fabrication of dielectric material having volume-distributed insulating barriers for use at high voltages and a ceramic body fabricated by said method
    Patent number: 4280846
    Abstract: A mixture of oxides or salts of barium, titanium and tin (principal materials) are initially ground with two different classes of dopants. The first class consists of oxides or salts of rare earths or of elements such as antimony. The second class consists of oxides or salts of elements such as manganese or copper. After calcining and sintering, cooling of the ceramic body is obtained by adjusting to a very low rate (negative gradient of 10 to 30.degree. C. per hour) in a pure oxygen atmosphere.The material is primarily suited for use in capacitors having one or a number of layers which may be separated by electrodes inserted prior to sintering. The material has high apparent permittivity and can be employed at much higher voltages than in barrier-layer capacitors.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: July 28, 1981
    Assignee: Thomson-CSF
    Inventors: Eliane Charles, Mieczyslaw Hildebrandt, Francois Buchy