Patents by Inventor Friedrich Wilhelm Krock

Friedrich Wilhelm Krock 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).

  • Production of light polarizing films
    Patent number: 5286420
    Abstract: A process for the production of light-polarizing films containing polyvinyl alcohol, dichroic dye-producing components, optionally other dye-producing components, optionally additives, and optionally surface active compounds, wherein the films comprise two or more layers and said film layers have a sudden change in composition at the layer phase boundaries between at least two layers, and said layers are applied to a substrate by means of a multiple coater.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: February 15, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Claussen, Friedrich-Wilhelm Krock, Edouard Roche
  • Anthraquinone dyestuffs
    Patent number: 4035398
    Abstract: The invention relates to water-insoluble anthraquinone dye-stuffs of the formula ##STR1## wherein A denotes an optionally substituted cycloalkylene group,n and m denote numbers from 0 to 4 andZ.sub.1 and Z.sub.2 denote hydrogen or halogen.The dyestuffs are outstandingly suitable for dyeing synthetic fibre materials, such as those made of cellulose esters, polyamides and polyurethanes and above all those made of aromatic polyesters, according to conventional dyeing processes.
    Type: Grant
    Filed: November 11, 1975
    Date of Patent: July 12, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Wilhelm Krock, Rudolf Braden, Rutger Neeff, Volker Hederich
  • Anthraquinone dyestuffs
    Patent number: 4017524
    Abstract: The invention is directed to the dyeing and printing of synthetic fiber materials from an aqueous medium with partially known dyestuffs of the formula ##STR1## wherein Y = C.sub.3 -C.sub.10 -alkylene group,X = oxygen or sulphur,Q = aralkyl andZ.sub.1 and Z.sub.2 = hydrogen or halogen as well as new dyestuffs of the above-indicated formula, wherein the aryl residue of the aralkyl group Q is substituted by at least one non-ionic substituent.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: April 12, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Wilhelm Krock, Rutger Neeff
  • Anthraquinone dyestuffs
    Patent number: 3957822
    Abstract: Anthraquinone dyestuffs of the formula ##SPC1##WhereinX.sub.1 and X.sub.2 represent hydroxyl or amino,R.sub.1, r.sub.2 and R.sub.3 represent hydrogen or a non-ionic substituent, and two adjacent radicals can also represent a fused saturated or unsaturated ring,Z.sub.1, z.sub.2 and Z.sub.3 represent halogen or especially hydrogen andn represents 0 or especially represents 1Are suitable for dyeing natural and synthetic fibre materials, especially those of polyamides.
    Type: Grant
    Filed: June 19, 1974
    Date of Patent: May 18, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Wilhelm Krock, Rutger Neeff
  • Anthraquinone dyestuffs
    Patent number: RE29577
    Abstract: Anthraquinone dyestuffs of the formula ##STR1## in which X.sub.1 denotes hydroxyl or amino, X.sub.2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, Z denotes alkylene, Ac denotes acyl and Y denotes hydrogen or halogen, and in which the ring A can optionally by substituted by halogen, as well as their preparation and use for the dyeing of synthetic fibre materials. The dyed materials show good fastness to light and sublimation.
    Type: Grant
    Filed: January 4, 1977
    Date of Patent: March 14, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Hederich, Friedrich Wilhelm Krock, Gunter Gehrke, Rutger Neeff