Patents by Inventor Martin Blunck

Martin Blunck 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).

  • Anthraquinone dyestuffs, their preparation and use and dichroic material containing these anthraquinone dyestuffs
    Patent number: 4689171
    Abstract: Dyestuffs of the formula ##STR1## in which Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4 designate hydrogen, halogen, nitro, amino, alkylamino, arylamino, cycloalkylamino, aralkylamino, alkylthio, arylthio, cycloalkylthio, aralkylthio or hydroxyl, it being possible for the hydrocarbon radicals to be sustituted, with the proviso that(a) at least one of the substituents Y.sub.1, Y.sub.2, Y.sub.3 or Y.sub.4 does not denote hydrogen,(b) a maximum of two of the substituents Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 designate halogen and either(c.sub.1) X.sub.1, X.sub.3 represent halogen, --R.sub.1, --OR.sub.1 or --SR.sub.1, R.sub.1 denoting optionally substituted alkyl, it being possible for the alkyl chain to be substituted by an oxygen atom or several non-adjacent oxygen atoms, optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted aralkyl or an optionally substituted heterocyclic radical and X.sub.2 designating hydrogen, or(c.sub.2) X.sub.1, X.sub.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: August 25, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Blunck, Uwe Claussen, Friedrich W. Krock, Rutger Neeff
  • Aryl-mercapto anthraquinone dyestuffs, their preparation and use and dichroic material containing aryl-mercapto anthraquinone dyestuffs
    Patent number: 4596666
    Abstract: Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 represents alkyl, aralkyl, --CO--X-alkyl, --CO-- X-aralkyl, --CO--X-aryl, --O-alkyl, --O-aralkyl, --O-- aryl, --CN, --NO.sub.2, --CF.sub.3, halogen or a heterocyclic radical andR.sub.2 represents H or R.sub.1,X representing O, S, NH or a direct bond andY.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 denoting hydrogen, --NH.sub.2, --OH, halogen, --NO.sub.2 or an arylmercapto group and at least one of the substituents Y.sub.1 -Y.sub.4 representing an arylmercapto group,it being also possible for the alkyl, aryl, aralkyl and heterocyclic radicals mentioned for R.sub.1 and Y.sub.1 -Y.sub.4 to be substituted, the preparation and use thereof, and dichroic material containing these anthraquinone dyestuffs.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: June 24, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Blunck, Uwe Claussen, Friedrich W. Krock, Rutger Neeff
  • Anthraquinone dyestuffs, processes for their preparation, their use, and liquid-crystalline materials containing anthraquinone dyestuffs
    Patent number: 4585574
    Abstract: Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl or aralkyl, and the said hydrocarbon radicals can be substituted, andQ denotes an aryl radical or heterocyclic radical or an --OR', --SR', --CH.dbd.N--R', ##STR2## --CHO or --SO.sub.2 --O--R' radical, whereinR' represents an aryl, aralkyl or heterocyclic radical, and the radicals mentioned for R' can be substituted,processes for their preparation, and liquid-crystalline materials containing anthraquinone dyestuffs.
    Type: Grant
    Filed: November 25, 1981
    Date of Patent: April 29, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Blunck, Uwer Claussen, Rutger Neeff