Patents by Inventor Angel Dimitrov Milkov

Angel Dimitrov Milkov 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 employing elemental zinc for the purification of aqueous solutions of metallic salts
    Patent number: 4078040
    Abstract: An improved technique for purifying a solution of metallic salts from copper and cadmium contained in such solution is described. A bed of zinc granules is disposed on a grid at the bottom of a vertically arranged, cylindrical reaction chamber. The solution to be purified is pumped upwardly through the grid and the zinc bed at a speed in the range of 0.08-0.5 m/sec. to impart a turbulent motion to the zinc granules throughout the height of the reaction chamber. The turbulence causes the copper-cadmium cake adhering to the zinc particles during the reaction to separate from the granules, so that the separated cake flows out of the reaction chamber with the purified liquid to be quickly and easily removed therefrom.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: March 7, 1978
    Assignee: Nipki po Tzvetna Metalurgia
    Inventors: Angel Dimitrov Milkov, Miladin Ivanov Kolarov, Nikola Tzanov Kunchev, Iliya Marinov Iliev, Kostadin Stankov Spassov, Georgi Stoykov Buyukliev