Patents by Inventor Gert Hegar

Gert Hegar 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).

  • Fiber reactive water soluble 2,4,6-triamino, 3-cyano pyridine-(5) azo dyestuffs
    Patent number: 4033943
    Abstract: Water-soluble azo dyes of the formula WHEREIN Y is a fiber-reactive group, n is 1 or 2, m is 0, 1 or 2 and the benzene rings A and B may be further substituted are disclosed. They are useful for dyeing nitrogen-containing fibers and cellulose materials and are distinguished by very bright and brilliant shades, possessing good stability, fastness to light, wet processing and fixation.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: July 5, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Visvanathan Ramanathan, Angelo Della Casa, Rene DE Montmollin, Gert Hegar, Hans Ulrich Schutz
  • Process for making azo compounds by coupling with nitrosated heterocyclic primary amines
    Patent number: 4028323
    Abstract: The invention relates to a process for the manufacture of azo compounds by reacting a nitrosated heterocyclic primary amine with, as a coupling component, an aminobenzene which is substituted in the amino group thereof by lower alkyl or lower cyanoalkyl, in the presence of a weakly acid medium and at a temperature of from room temperature to about 100.degree. C.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: June 7, 1977
    Assignee: Ciba-Geigy AG
    Inventors: Gert Hegar, Hans-Joerg Angliker
  • 3-Halogeno-6-hydroxy-pyridone-(2) azo dyestuffs
    Patent number: 4017477
    Abstract: New azo compounds containing the radical of a 3-halogeno-6-hydroxy-pyridone-(2) of the formula ##STR1## wherein X represents halo, R and R' represent hydrogen aryl, cyclohexyl, alkyl or substituted alkyl and D represents the residue of a diazo component of the benzene series, said compounds useful as dyestuffs.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: April 12, 1977
    Assignee: Ciba-Geigy AG
    Inventors: Gert Hegar, Henri Riat
  • 3-Sulphoalkyl-6-hydroxy-pyrid-(2)-ones
    Patent number: 3994906
    Abstract: A compound of the formula ##SPC1##Wherein R and R' each represent a hydrogen atom, an alkyl or aryl radical or a heterocyclic radical and X represents a sulphoalkyl group. These compounds are useful as coupling components for the manufacture of dyestuffs which are distinguished by high tinctorial strength.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: November 30, 1976
    Assignee: Ciba-Geigy AG
    Inventor: Gert Hegar
  • Basic azo dyestuffs containing a heterocyclic diazo component and a para-N-tertiary or quaternary heterocyclic amine alkylene amino benzene coupling component
    Patent number: 3988311
    Abstract: Basic azo dyestuffs of the formula ##SPC1##WhereA is heterocyclic disazo component of the thiazole, benzthiazole or thiadiazole series,R.sub.1 and R.sub.2 are hydrogen, chlorine, lower alkyl or lower alkoxy,X is hydrogen, an alkyl, aralkyl, cycloalkyl or aryl group,m is 2 to 2,Z is the residue of a quaternizable heterocyclic amine bound via its ring nitrogen atom,Are disperse dyestuffs particularly useful with polyester textiles and provide dyeings of good general fastness, notably fastness to light.
    Type: Grant
    Filed: April 9, 1974
    Date of Patent: October 26, 1976
    Assignee: Ciba-Geigy AG
    Inventor: Gert Hegar