Patents by Inventor Erwin Eleckenstein

Erwin Eleckenstein 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).

  • Substituted pyridine compounds
    Patent number: 3956294
    Abstract: Compounds of the formula ##SPC1##Wherein X is aliphatic, cycloaliphatic, aromatic, aralkyl, hetaryl, hetarylalkyl or hydrogen; Y is aliphatic, aromatic, aralkyl, --COOR.sub.2, --COR.sub.2, ##EQU1## --CN, --NH.sub.2, --NO, --NO.sub.2 or hydrogen with the proviso that when Y is hydrogen, X is other than hydrogen; Z.sub.1 is cyano, ##EQU2## --OR.sub.12, --SR.sub.12 or --SO.sub.2 R.sub.12 and Z.sub.2 is chlorine, bromine, cyano, hydroxy, mercapto, ##EQU3## R.sub.1 is aliphatic; R.sub.2 is aliphatic, cycloaliphatic, aromatic, aralkyl or heterocyclic; R.sub.3 and R.sub.4 when taken separately are hydrogen, aliphatic, cycloaliphatic, aromatic or aralkyl; R.sub.3 and R.sub.4 when taken together with the nitrogen atom to which they are attached form a heterocyclic moiety; R.sub.5 and R.sub.6 when taken separately are aliphatic, aromatic, aralkyl, heterocyclic or hydrogen; R.sub.5 and R.sub.6 when taken together with the nitrogen atom to which they are attached are heterocyclic; R.sub.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: May 11, 1976
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Erwin Eleckenstein, Ernst Heinrich, Reinhard Mohr