Patents by Inventor Frank Bartkowiak

Frank Bartkowiak 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).

  • Di-styrl-phenyl-triglycol ether as crystallization inhibitor
    Patent number: 5053421
    Abstract: In the spraying of an aqueous liquor comprising at least one of 1-(4-chlorophenyl)-4,4-dimethyl-3-(1,2,4-triazol-1-yl-methyl)-pentan-3-ol and 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)-butan-2-ol, the improvement which comprises including in the liquor di-styryl-phenyl-tri-glycol ether, whereby crystallization of II and III is reduced.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 1, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Otto Horstmann, Ulrich Engelhardt, Karl Reizlein, Rolf-Jurgen Singer, Klaus Wangermann, Wolfgang Wirth, Frank Bartkowiak, Gunther Boehmke, Hans Schulze
  • Carrier mixture for the dyeing of polyester materials: n-alkylphthalimide and aromatic ester or ether
    Patent number: 4994089
    Abstract: The carrier mixture contains N-alkylphthalimides and compounds of the general formula ##STR1## in which R is C.sub.1 -C.sub.7 -alkyl; phenyl, benzyl or phenylethyl, which can be substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkoxycarbonyl,R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.3 -alkylcarbonyloxy, hydroxyl or C.sub.1 -C.sub.4 -alkoxycarbonyl,m is 0 or 1,n is 0 or 1, m and n not being 0 at the same time.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: February 19, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Bartkowiak, Hans Schulze, Wolf-Dieter Schroer, Gunther Boehmke, Karlhans Jakobs, Willi Schossler
  • Levelling agents for disperse dyeing of polyester: ethoxylate or propoxylate of substituted phenol, emulsifier and carrier
    Patent number: 4943299
    Abstract: Levelling agents containingI. ethers of the general formula ##STR1## in which R.sub.1 denotes alkyl, alkenyl, cycloalkyl, aryl or aralkyl,R.sub.2 denotes hydrogen or methyl,x denotes 1, 2 or 3 andy denotes 0 to 7, andII. emulsifiers and, if desired,III. carriers for the dyeing of polyesters are used for the high-temperature dyeing of polyester fibres and polyester-containing materials.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: July 24, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans Schulze, Klaus Walz, Frank Bartkowiak, Karlhans Jakobs