Patents by Inventor Zsofia Feher

Zsofia Feher 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: 4939410
    Abstract: Electrode arrangement with liquid-metal electrode of controllable surface, comprising a liquid-metal reservoir, a capillary connected thereto through a controllable valve and contact means being in electric contact with the liquid-metal in the capillary. According to the invention at least one section of the capillary is formed within a metal body not reacting chemically with the liquid-metal, said metal body constituting the contact means. Preferably, the metal body is formed so that an elastic closing element of the valve fits to a surface of the metal body surrounding an opening of the capillary section formed therein.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: July 3, 1990
    Assignee: Magyar Tudomanyos Akademia Kutatas- es Szervezetelemzo Intezete
    Inventors: Geza Nagy, Jozsef Tarcali, Erno Pungor, Klara Toth, Veronika, nee Mohacsi Karpati, Zsofia Feher, Gyorgy Horvai, Peter Sarkany, Istvan Bokor
  • Patent number: 4673295
    Abstract: In a method and an apparatus for performing routine analyses such as polarographic or spectrophotometric analysis on a large set of sample solutions filled into separate sample cups being arranged on or shaped in a sample cup holder (101) along a moving path, wherein the samples are in consecutive cycles sucked out of the sample cup (102) by a suction tube (103) and transferred into a common vessel, wherein the analysis will be performed. The vessel (105) has a lower outlet (107) communicating with an analyzer cell (112) or the ambient space over a channel (116) which is only effective if the sample level in the vessel (105) exceeds a certain threshold level, and an aspirating mouth (108) in the upper part of the vessel (105) communicating over a valve (109) with the ambient space. The suction tube (103) has a fixed end coupled to the inlet (106) of the vessel (105) and a free end can be moved into two different working positions.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: June 16, 1987
    Assignees: Richter Gedeon Vegyeszeti Gyar, Budapesti Muszaki Egyetem
    Inventors: Erno Pungor, Klara S. Toth, Zsofia Feher, Geza Nagy, Gyorgy Horvai
  • Patent number: 4120657
    Abstract: The invention relates to a process of and equipment for a selective, quick and accurate analysis of liquid samples. According to the process of the invention a liquid or a gas sample absorbed by a liquid is allowed to flow at a constant volume rate and overtitrated with an amount of a reagent adequate to the measurement in a definite time. Then the flow of the reagent is decreased to zero in a definite time, meanwhile continuously following, in a known way, the changes occurring in the reaction mixture. The determination of the concentration is carried out by comparing the time elapsed between the appearances of the two chemical equivalence points with calibration curves prepared with standard solutions, said time having a well defined functional relationship with the concentration of the sample.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: October 17, 1978
    Assignee: EGYT Gyogyszervegyeszeti Gyar
    Inventors: Geza Nagy, Erno Pungor, Klara Toth, Jeno Havas, Zsofia Feher