The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 1988
Filed:
Nov. 01, 1984
Applicant:
Inventors:
Laszlo Toke, Budapest, HU;
Bela gai, Budapest, HU;
Istvan Bitter, Budapest, HU;
Erno Pungor, Budapest, HU;
Klara Szepesvary nee Toth, Budapest, HU;
Erno Lindner, Budapest, HU;
Maria Forro nee Horvath, Budapest, HU;
Jeno Havas, Budapest, HU;
Assignee:
Magyar Tudomanyos Akademia, Budapest, HU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549351 ; 549347 ;
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.