Patents by Inventor Hans Hochstetter

Hans Hochstetter 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).

  • Pyrazoloazepinones and methods of using such pyrazoloazepinones to dye synthetic fibers and to pigment pastes, paints, printing inks, colored paper and colored macromolecular substances
    Patent number: 5258511
    Abstract: Heterocyclic compounds of the formula ##STR1## in which R represents hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted hetaryl,A represents C--R.sup.1, N,R.sup.1 represents substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted hetaryl,X, Y represent O, NH,Z represents hydrogen, --CN, substituted or unsubstituted aryl, substituted or unsubstituted hetaryl,W represents O, N--R.sup.5,R.sup.5 represents hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, a substituted or unsubstituted heterocyclic radical andB represents a substituted or unsubstituted carbocyclic-aromatic or heterocyclic ring onto which one or more further rings can be fused,and the use of these compounds as dyestuffs or pigments.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: November 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans Hochstetter
  • Heterocyclic compounds
    Patent number: 5241068
    Abstract: Compounds of the formulae ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, X.sup.1 and Y.sup.1 have the stated meanings, processes for their preparation and their use.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: August 31, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christina Diblitz, Hans Hochstetter
  • Tricycle pyrazine dyes
    Patent number: 5164496
    Abstract: Compounds of the formula ##STR1## in which R.sup.1, R.sup.2, X.sup.1, X.sup.2, Y.sup.1 and Y.sup.2 have the following meaningsR.sup.1 and R.sup.2 designate optionally substituted aryl, or an optionally substituted heterocyclic radical which contain 1 or 2 five-, six- or seven-membered rings at least one of which contains 1, 2 or 3 hetero atoms from the series comprising O, N and S which has a C.dbd.C in conjugation with the C.dbd.C bond in the five-membered ring of III,X.sup.1, X.sup.2, Y.sup.1 and Y.sup.2 designate O, S, NR.sup.5, or X.sup.1 and Y.sup.1 or X.sup.2 and Y.sup.2 in each case form parts of a fused-on heterocyclic five-membered or six-membered ring,processes for their preparation and their use as dyestuffs and pigments.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: November 17, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans Hochstetter
  • Heterocyclic compounds
    Patent number: 5097027
    Abstract: Heterocyclic compounds of the formula ##STR1## are used as pigments for surface coatings and for coloring and pigmenting high molecular weight organic material.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: March 17, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans Hochstetter
  • Polycyclic aromatic azacyclic compounds useful in dyeing
    Patent number: 5095103
    Abstract: Heterocyclic compounds of the formula ##STR1## with the substituent meanings given in the description, and derivatives thereof are suitable for dyeing and pigmenting the most diverse substrates.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: March 10, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventor: Hans Hochstetter