Patents by Inventor Dieter Oehme

Dieter Oehme 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: 5548072
    Abstract: Water-soluble azo compounds, preparation thereof and use thereof as dyesThere are described monoazo compounds conforming to the formula (1) ##STR1## which are used as dyes having fiber-reactive properties for preparing strong, red, fast dyeings and prints on hydroxy- and/or carboxamido-containing material, in particular fiber material, such as wool and synthetic polyamide fibers and in particular cellulose fibers, such as cotton.In the formula (1):M is hydrogen or an alkali metal; R.sup.1 is hydrogen or sulfo; R.sup.2 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, sulfo, hydroxy, halogen or carboxy; R.sup.3 is hydrogen, halogen, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms; Y is vinyl or is ethyl which contains in the .beta.-position a substituent which is eliminable with alkali to form a vinyl group; p is 1 or 2; the one --SO.sub.3 M group is attached to the naphthalene ring para or meta to the amino group.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 20, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: J org Dannheim, Dieter Oehme, Horst Tappe
  • Patent number: 5243034
    Abstract: Disazo dyestuffs containing sulfo groups and having fiber-reactive properties, which are capable of dyeing materials containing hydroxyl groups and/or carboxamide groups, in particular fiber materials, such as synthetic polyamide fibers, wool and in particular cellulose fiber materials, in deep fast shades. They contain a group corresponding to the formula ##STR1## in which R.sup..alpha. is hydrogen or alkyl having 1 to 4 carbon atoms, which can be substituted by carboxyl, sulfo, cyano, hydroxyl or chlorine;B is fluorine, chlorine, bromine, lower alkylsulfonyl, phenylsulfonyl, methoxy or sulfo;Q is a group of the formula ##STR2## in which Y is vinyl, .beta.-sulfatoethyl, .beta.-halogenoethyl, .beta.-thiosulfatoethyl, .beta.-phosphatoethyl or .beta.-acetoxyethyl,R is hydrogen or lower alkyl,k is the number zero to 4 andX, together with the N atom, forms the bivalent radical of a heterocyclic ring which optionally contains additional hetero atoms.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: September 7, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Horst Tappe, Dieter Oehme, Holger M. Buch, Werner H. Russ
  • Patent number: 4963661
    Abstract: Water-soluble monoazo compounds according to the general formula (1) below having valuable fiber-reactive dyestuff properties which dye carboxamido- and/or hydroxy-containing materials, in particular cellulose fibers, in fast yellow to orange hues. ##STR1## in which the symbols denote: M is hydrogen or an alkali metal,R.sup.1 is hydrogen, methyl, ethyl, methoxy, ethoxy, chlorine, bromine, carboxy or sulfo,R.sup.2 is hydrogen, methyl, ethyl, methoxy, ethoxy, chlorine, or bromine,R is carboxy or lower carbalkoxy,n is the number zero or 1,X and Y independently of each other are each .beta.-thiosulfatoethyl or .beta.-sulfatoethyl or vinyl, however, in the case of X and/or Y being equal to vinyl the index n must be 1.
    Type: Grant
    Filed: May 24, 1988
    Date of Patent: October 16, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Horst Tappe, Dieter Oehme, Ludwig Schlafer, Werner H. Russ
  • Patent number: 4948879
    Abstract: Monoazo compounds conforming to the general formula (1) shown and defined hereinafter have very good fiber-reactive dye properties and dye hydroxy- and/or carboxamido-containing material, in particular fiber material, such as wool and in particular cellulose fibers, in strong fast shades. ##STR1## where the symbols have the following meanings: D is a benzene or naphthalene ring or a heterocyclic radical,R.sup.1 and R.sup.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: August 14, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Horst Tappe, Dieter Oehme, Werner H. Russ