Patents by Inventor Hans Balzer

Hans Balzer 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).

  • Fluorescent 1,2,3-triazole derivatives of 3-phenylcoumarin
    Patent number: 4182861
    Abstract: Polyester, cotton, polyamide and polyacrylonitrile fabrics and foils of polyvinylchloride are optically brightened by the addition of a compound of the formula ##STR1## in which each of R.sub.1 and R.sub.2 represents a hydrogen atom or an aliphatic, alicyclic, araliphatic, halogen- or alkyl-substituted araliphatic, aromatic, or halogen- or alkyl-substituted aromatic radical,R.sub.3 represents a hydrogen or halogen atom or a low molecular weight alkyl or alkoxy radical.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: January 8, 1980
    Assignee: Sandoz Ltd.
    Inventors: Fritz Fleck, Hans Balzer, Horst Aebli
  • Fluorescent 1,2,3-triazole derivatives of 3-phenylcoumarin
    Patent number: 4006158
    Abstract: Polyester, cotton, polyamide and polyacrylonitrile fabrics and foils of polyvinylchloride are optically brightened by the addition of a compound of the formula ##STR1## in which each of R.sub.1 and R.sub.2 represents a hydrogen atom or an aliphatic, alicyclic, araliphatic, halogen- or alkyl-substituted araliphatic, aromatic, or halogen- or alkyl-substituted aromatic radical,OrR.sub.1 and R.sub.2 together with the two carbon atoms of the triazole ring form a five or six membered cycloalkyl ring or such a cycloalkyl ring having condensed on it a benzene ring,R.sub.3 represents a hydrogen or halogen atom or a low molecular weight alkyl or alkoxy radical.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: February 1, 1977
    Assignee: Sandoz Ltd.
    Inventors: Fritz Fleck, Hans Balzer, Horst Aebli
  • Bis-(triazinylamino)stilbene compounds
    Patent number: 3970647
    Abstract: Disclosed are stilbene compounds of formula I, ##SPC1##in whichR.sub.1 signifies hydrogen, halogen or C.sub.1-6 alkyl,R.sub.2 signifies hydrogen or methyl,R.sub.3 signifies cyano or a radical --CONR.sub.7 R.sub.8 in which either R.sub.7 and R.sub.8, independently, each signifies hydrogen, C.sub.1-6 alkyl or C.sub.2-6 hydroxyalkyl, or R.sub.7 and R.sub.8, together with the nitrogen atom, signify a pyrrolidine, piperidine or morpholine radical,Either R.sub.4 and R.sub.5, independently, each signifiesC.sub.1-6 alkyl or C.sub. 2-6 hydroxyalkyl, or R.sub.4 and R.sub.5, together with the nitrogen atom, form a radical (a) ##EQU1## in which --X-- signifies --CH.sub.2 --, --O--, --S--, a direct bond, or --NR.sub.9 --, in which R.sub.9 signifies C.sub. 1-6 alkyl or C.sub.2-6 hydroxy-alkyl,R.sub.6 signifies hydrogen or C.sub.1-6 alkyl, unsubstituted or substituted by hydroxy, cyano or aminocarbonyl,M signifies hydrogen or a non-chromophoric cation,A.sup.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: July 20, 1976
    Assignee: Sandoz Ltd.
    Inventors: Hans Balzer, Fritz Fleck, Hans-Rudolf Schmid