Patents by Inventor Rali V. Ralev

Rali V. Ralev 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 and apparatus for measuring the thickness of one liquid overlying another
    Patent number: 4184363
    Abstract: A method of and an apparatus for measuring the thickness of one liquid layer, e.g. oil, overlying another liquid in which a conical body is lowered into the liquids until the upper layer surface reaches the neck of the cone and a sensor detects the interface, whereupon thickness is determined as a function of the height of the overlying layer in the cone.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: January 22, 1980
    Assignee: So "Voden Transport"
    Inventors: Grigor D. Vassilev, Zdravko A. Yordanov, Lyubomir A. Stoyanov, Rali V. Ralev, Kosta M. Kostov