Patents by Inventor Klara Szepesvary nee Toth

Klara Szepesvary nee Toth 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).

  • New crown ether derivatives, process for the preparation thereof and ion-selective membrane electroes comprising the same
    Patent number: 4739081
    Abstract: The invention relates to new crown ether derivatives of the general Formula I ##STR1## and a process for the preparation thereof wherein Z.sup.1 is a group of the general Formula ##STR2## R.sub.a and R.sub.b may be the same or different and R.sub.a represents an alkyl group having 1-4 carbon atoms and R.sub.b is an alkyl group having 1-20 carbon atoms.The new crown ethers are useful in the preparation of ion-selective electrodes having a long lifetime.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: April 19, 1988
    Assignee: Magyar Tudomanyos Akademia
    Inventors: Laszlo Toke, Bela gai, Istvan Bitter, Erno Pungor, Klara Szepesvary nee Toth, Erno Lindner, Maria Forro nee Horvath, Jeno Havas
  • Crown ether compounds, process for the preparation of the crown ether complex forming agents and ion-selective membrane electrodes containing the same
    Patent number: 4531007
    Abstract: New crown ether derivatives of formula (I) ##STR1## wherein R stands for hydrogen or C.sub.1-4 alkyln stands for 1,2,X stands for oxygen, sulphur or a NH-groupY represents hydrogen or nitroZ represents a chemical bond, --CH.sub.2 --, --(CH.sub.2).sub.2-4 --, --CH.sub.2 OCH.sub.2 --, --CH.sub.2 SCH.sub.2 --, ##STR2## or a group of the formula ##STR3## suitable for forming cation complexes, process for the preparation thereof and alkali or alkali earth metal ion-selective membrane electrodes containing said compounds are described.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: July 23, 1985
    Assignee: Magyar Tudomanyos Akademia
    Inventors: Laszlo Toke, Bela gai, Istvan Bitter, Erno Pungor, Klara Szepesvary nee Toth, Erno Lindner, Maria Horvath, Jeno Havas