Patents by Inventor Herbert Eichenberger

Herbert Eichenberger 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).

  • Metal-free azo compounds containing a vinylsulfonyl group and at least one basic group and 1:1 and 1:2 metal complexes thereof
    Patent number: 4820806
    Abstract: Metal-free monoazo and disazo compounds of the formulaCH.sub.2 .dbd.CH--SO.sub.2 --W.sub.1 --D--N.dbd.N--K--(W.sub.2 --Z).sub.n,1:1 and 1:2 metal complexes of such metallizable metal-free compounds and acid addition salts of such metal-free compounds and 1:1 and 1:2 metal complexes, whereinD is the radical of a diazo component of the benzene, naphthalene or tetrahydronaphthalene series,K is the radical of a coupling component of the benzene, naphthalene, pyrazol-5-one, pyridine, pyridone, barbituric acid, quinoline, isoquinoline, benzeneazobenzene, benzeneazonaphthalene, naphthaleneazobenzene, naphthaleneazonaphthalene, tetrahydronaphthaleneazobenzene, tetrahydronaphthaleneazonaphthalene or acetoacetamide series,W.sub.1 is a direct bond or a divalent bridging radical,each W.sub.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: April 11, 1989
    Assignee: Sandoz, Ltd.
    Inventors: Werner Baumann, Joseph V. Diest, Herbert Eichenberger, Max Oppliger