Patents by Inventor Hans R. Schwander

Hans R. Schwander 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: 4152114
    Abstract: A class of dispersible phenyl-azo-aniline dyestuffs corresponding to the formula ##STR1## wherein A is phenyl substituted by halogen, cyano, nitro, lower alkylsulphonyl, lower alkoxycarbonyl, di-lower-alkyl-carbamoyl or di-lower-alkyl-sulfamoyl,X is hydrogen, lower alkyl or lower alkanoylamino,Y is halogen or lower alkoxy-carbonyl,Z is hydrogen or lower alkanoyl or chloroacetyl, of R.sub.1 and R.sub.2 one R is hydrogen and the other R is lower alkyl, cyclohexyloxy-lower alkyl, phenyl-lower-alkoxy-lower alkyl, phenoxy-lower alkyl, lower alkanoyloxy-lower-alkyl, cyano-lower-alkyl, brominated lower alkyl, chlorinated lower alkyl, lower alkoxy carbonyl, cyclohexyl, phenyl or phenyl substituted by bromine, chlorine, lower alkyl or lower alkoxy.These dyestuffs are distinguished by good affinity and levelling and build-up properties especially for polyester fibres, affording dyeings on these fibres which have good fastness properties and especially good fastness to sublimation.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: May 1, 1979
    Assignee: Ciba-Geigy AG
    Inventors: Stefan Koller, Dieter Reinker, Hans R. Schwander