Patents by Inventor Joachim Valentin

Joachim Valentin 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).

  • Azo dyestuffs containing an .alpha.-phenylamino isobutyric acid alkyl ester coupling component
    Patent number: 4087420
    Abstract: A water-insoluble azo dyestuff of the formula ##STR1## wherein D is an optionally substituted aromatic or heteroaromatic radical free of ionic groups; X is hydrogen or optionally substituted alkoxy; Y is hydrogen, optionally substituted alkyl, alkenyl, cycloalkyl, phenyl, hetaryl, alkoxy or phenoxy or --NHR.sup.4 wherein R.sup.4 is alkyl, alkenyl, cycloalkyl, aralkyl or aryl; R.sup.1 and R.sup.2 are hydrogen or alkyl and R.sup.3 is optionally substituted alkyl and its utility in the dyeing and printing of hydrophobic synthetic fibers and films such as polyesters.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: May 2, 1978
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Ernst Heinrich, Jachim Ribka, Joachim Valentin
  • Water-insoluble azo dyestuffs
    Patent number: 4035143
    Abstract: A water-insoluble azo dyestuff of the formula ##STR1## wherein D is an optionally substituted aromatic or heteroaromatic radical free of ionic groups; X is hydrogen or optionally substituted alkoxy; Y is hydrogen, optionally substituted alkyl, alkenyl, cycloalkyl, phenyl, hetaryl, alkoxy or phenoxy or --NHR.sup.4 wherein R.sup.4 is alkyl, alkenyl, cycloalkyl, aralkyl or aryl; R.sup.1 and R.sup.2 are hydrogen or alkyl and R.sup.3 is optionally substituted alkyl and its utility in the dyeing and printing of hydrophobic synthetic fibers and films such as polyesters.
    Type: Grant
    Filed: November 11, 1975
    Date of Patent: July 12, 1977
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Ernst Heinrich, Joachim Ribka, Joachim Valentin