Patents by Inventor Walter Kalk

Walter Kalk 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).

  • Quaternary reactive compounds
    Patent number: 4695632
    Abstract: Quaternary compounds of the formula ##STR1## wherein K.sym. denotes a cationic organic radical,X denotes a linking member,R denotes the radical of a heterocyclic reactive group,m denotes the numbers 1 or 2,n denotes the numbers 1 or 2 andAn.crclbar. denotes an anion,can be used for increasing the affinity of anionic dyestuffs for natural or synthetic fiber materials containing nitrogen or hydroxyl groups.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: September 22, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Kalk, Karl H. Schundehutte, Manfred Soll
  • Quaternary reactive compounds
    Patent number: 4362874
    Abstract: Quaternary compounds of the formula[(K.sup..sym..sub.m --X--).sub.n R]m.multidot.n.multidot.An.sup..crclbar.whereinK.sup..sym. denotes a cationic organic radical,X denotes a linking member,R denotes the radical of a heterocyclic reactive group,m denotes the numbers 1 or 2,n denotes the numbers 1 or 2 andAn.sup..crclbar. denotes an anion,can be used for increasing the affinity of anionic dyestuffs for natural or synthetic fibre materials containing nitrogen or hydroxyl groups.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: December 7, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Kalk, Karl H. Schundehutte, Manfred Soll
  • Benzo-[c]-cinnolinium dyestuffs
    Patent number: 4139530
    Abstract: Cationic dyestuffs of the general formula ##STR1## IN WHICH THE SYMBOLS HAVE THE MEANING MENTIONED ABOVE INTERMEDIATES AND PROCESSES FOR THEIR PRODUCTION AND THEIR USE FOR DYEING AND PRINTING OF NATURAL AND SYNTHETIC MATERIALS.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: February 13, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Kalk, Karl H. Schundehutte
  • Process for the preparation of diaryl compounds
    Patent number: 4102924
    Abstract: Process for the preparation of diaryl compounds of the formula ##STR1## by reacting of acylamino-aryl-compounds of the formula ##STR2## WITH ARYL COMPOUNDS OF THE FORMULA ##STR3## IN THE PRESENCE OF METALLIC COPPER OR ITS MIXTURE WITH COPPER SALTS, OPTIONALLY IN THE PRESENCE OF CATALYSTS, IN A SOLVENT WHICH IS INERT UNDER THE REACTION CONDITIONS, AT TEMPERATURES OF 20.degree. TO 200.degree. C. In the formulae A and B represent an aromatic ring system, R represents acyl and X represents a nitro, nitrile, carboxylic ester, acyl or --NH--R group.
    Type: Grant
    Filed: October 7, 1975
    Date of Patent: July 25, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Kalk, Hans Samuel Bien, Karl Heinz Schundehutte