Patents by Inventor Thomas Eizenhofer

Thomas Eizenhofer 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).

  • Compounds useful for the preparation of bi-and polyfunctional reactive dyestuffs
    Patent number: 5686642
    Abstract: Reactive dyestuffs which, in the form of the free acid, correspond to the following formula ##STR1## wherein D is the radical of an organic dyestuff of the mono-azo, polyazo or metal complex azo series and the other substituents have the meaning given in the description, show improved application properties.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: November 11, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Konrad Bootz, Manfred Hoppe, Eckhard Bock, Wolfram Reddig, Thomas Eizenhofer, Wolfgang Harms, Karl-Josef Herd
  • Bifunctional reactive dyestuff mixture
    Patent number: 5460631
    Abstract: Reactive dyestuff mixtures containing one or more monochlorotriazine dyestuffs of the formula (1) ##STR1## and one or more monofluorotriazine dyestuffs of the formula (2) ##STR2## in which the substituents have the meaning given in the description, show on-tone exhaustion onto fibres and are fixed uniformly even under different fixation conditions.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: October 24, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Hoppe, Karl-Josef Herd, Konrad Bootz, Stefan Ehrenberg, Thomas Eizenhofer, Wolfgang Harms, Hermann Henk, Klaus Kunde, Stefan Meier, Wolfram Reddig
  • Azo dyestuffs containing fluorotriazinyl and vinylsulfonylmethyl-type reactive groups
    Patent number: 5428141
    Abstract: Reactive dyestuffs which, as the free acid, have the following formula ##STR1## in which K is ##STR2## the bonding to the triazinyl radical taking place in each case via the amino function of K, and the remaining substituents have the meaning given in the description, are suitable in particular for the dyeing and printing of natural and synthetic OH- and/or amido-containing materials.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: June 27, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Josef Herd, Thomas Eizenhofer, Wolfgang Harms, Manfred Hoppe, Wolfram Reddig
  • 2-amino-4-phenylamino-1,3,5-triazinyl reactive dyestuffs, process for their preparation and their use dye cellulose or polyamides
    Patent number: 5420256
    Abstract: Reactive dyestuffs have the following formula ##STR1## in which D is the radical of an organic dyestuffB is a direct bond or a bridging member on a ring C atom of an aromatic-carbocyclic or on a ring C atom or N atom of an aromatic-heterocyclic ring in D,R.sub.a, R.sub.b, identical or different, are H, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkyl substituted by OH, CN, CO.sub.2 H, OSO.sub.3 H or SO.sub.3 H,U is Cl, F or a pyridinium radical which is unsubstituted or substituted by CO.sub.2 H, CONH.sub.2, SO.sub.3 H or C.sub.1 -C.sub.4 -alkyl,W is straight-chain or branched C.sub.1 -C.sub.6 -alkylene,Y is CH.dbd.CH.sub.2 or CH.sub.2 --CH.sub.2 --X, in whichX is a radical which can be eliminated by alkali,V is H, halogen, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.3 -alkyl, CN, COOH, CONH.sub.2, SO.sub.3 H.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: May 30, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eizenhofer, Wolfgang Harms, Karl-Josef Herd
  • Reactive pyridone-containing dyestuffs, their preparation and their use
    Patent number: 5412078
    Abstract: The reactive dyestuffs of the formula ##STR1## wherein the substituents have the meaning given in the description, are particularly suitable for dyeing naturally occurring and synthetic materials containing OH groups and/or amide groups.
    Type: Grant
    Filed: January 26, 1993
    Date of Patent: May 2, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eizenhofer, Wolfgang Harms, Karl-Josef Herd
  • Triazine ring-containing reactive dyestuffs, their preparation and use
    Patent number: 5405947
    Abstract: Reactive dyestuffs which, in the form of the free acid, have the following formula ##STR1## in which X denotes fluorine, chlorine or bromine andSO.sub.2 -Z denotes a specific reactive radical,the remaining substituents having the meaning given in the description, and show improved fixation yield in dyeing.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: April 11, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Hoppe, Eckhard Bock, Wolfram Reddig, Thomas Eizenhofer, Wolfgang Harms, Karl-Josef Herd
  • Reactive dyestuff containing triazinyl and halopyrimidine moieties
    Patent number: 5340928
    Abstract: Reactive dyestuffs of the formula (1) ##STR1## in which D denotes the radical of an organic dyestuff,R, R.sub.1 and R.sub.2, independently of one another, denote hydrogen or substituted or unsubstituted C.sub.1-4 -alkyl,A denotes a substituted or unsubstituted aliphatic, aromatic or aromatic-aliphatic bridging member,X denotes Cl, FPym denotes the radicals ##STR2## n denotes 1 or 2, are suitable in particular for the dyeing of cellulose fibres.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: August 23, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Hoppe, Karl-Josef Herd, Thomas Eizenhofer, Wolfgang Harms, Hermann Henk, Klaus Kunde, Wolfram Reddig
  • Bifunctional reactive dyestuffs containing the 2-(N-substituted amino)-4-(N-phenylamino)-1,3,5-trlazinyl moiety
    Patent number: 5256774
    Abstract: Improved reactive dyestuffs have the following formula ##STR1## in which the substituents have the meaning given in the description.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: October 26, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Harms, Thomas Eizenhofer
  • Formazan dyestuffs
    Patent number: 5220057
    Abstract: Dyestuffs of the formula ##STR1## in which the substituents have the meanings given in the description are suitable for the dyeing and printing of hydroxyl- and amido-containing materials.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: June 15, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eizenhofer, Karl-Josef Herd, Hermann Henk, Rolf Brockmann, Frank-Michael Stohr, Karl-Heinz Schundehutte