Patents by Inventor Klaus Szablikowski

Klaus Szablikowski 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).

  • Patent number: 6939960
    Abstract: A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ?60%, based on the total degree of substitution.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: September 6, 2005
    Assignee: Wolff Walsrode AG
    Inventors: Erik-Andreas Klohr, Jörg Neubauer, Wolfgang Koch, Klaus Szablikowski, Detmar Redeker, Wolfgang Wagenknecht, Fritz Loth
  • Patent number: 6559300
    Abstract: A water-soluble, biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester is disclosed. The hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester has: (i) a molecular degree of substitution of the hydroxyalkyl group of less than 1.5 (MShydroxyalkyl<1.5); and (ii) a molecular degree of substitution of the 2-hydroxycarboxylic acid group of greater than 0.4 and less than 3 (0.4<MS2-hydroxycarboxylic acid<3). Also described is a method of preparing the hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester, and methods of using it, e.g., as a consistency regulator in at least one of foodstuffs, cosmetics, building materials, paints and strippers.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: May 6, 2003
    Assignee: Wolff Walsrode AG
    Inventors: Joachim Simon, Hanns-Peter Müller, Rainhard Koch, Volkhard Müller, Jürgen Engelhardt, Klaus Szablikowski, Wolfgang Koch
  • Publication number: 20030032798
    Abstract: Cellulose ethers with a specific substitution pattern, wherein they are substituted predominantly in the C3 position of the anhydroglucose unit of the cellulose.
    Type: Application
    Filed: September 30, 2002
    Publication date: February 13, 2003
    Inventors: Erik-Andreas Klohr, Jorg Neubauer, Wolfgang Koch, Klaus Szablikowski, Detmar Redeker, Wolfgang Wagenknecht, Fritz Loth
  • Patent number: 6482940
    Abstract: A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based on the total degree of substitution. Also described is a process for preparing the cellulose ether of the present invention. The process involves, reacting cellulose, dissolved in N-methylmorpholine-N-oxide monohydrate (NMMNO) and optionally other inert organic solvents, with alkylation reagents. The reaction takes place in the presence of: (i) an insoluble solid phase catalyst, e.g., solid ion exchange resins based on polystyrene having quaternary ammonium groups; (ii) stabilizers, e.g., propyl gallate; and (iii) optionally additional soluble co-catalysts, e.g., trimethylbenzylammonium hydroxide.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: November 19, 2002
    Assignee: Wolff Walsrode AG
    Inventors: Erik-Andreas Klohr, Jörg Neubauer, Wolfgang Koch, Klaus Szablikowski, Detmar Redeker, Wolfgang Wagenknecht, Fritz Loth
  • Patent number: 6146858
    Abstract: Samples of commercial cellulose having high crystallinity (>80%) and a degree of polymerization of approximately 1500 were pretreated enzymatically under various conditions with commercial endoglucanases, before the chemical conversion to substituted cellulose derivatives was carried out. The enzymatically pretreated cellulose samples exhibited a significantly higher substitution, up to 222% higher, in comparison with control samples which had been treated with buffer without enzyme. The increase in substitution during the chemical reaction could be observed in the presence of various amounts of alkali, but fell as the amounts of alkali decreased. At the same degree of substitution of the cellulose derivative, the use of cellulose pretreated with endoglucanase significantly reduced the amount of alkali required by 60%, as compared with the use of cellulose pretreated only with buffer.
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: November 14, 2000
    Assignee: Wolff Walsrode AG
    Inventors: Rainhardt Koch, Frank Berendes, John Foster, Hans-Georg Rast, Jurgen Engelhardt, Jorg Neubauer, Wolfgang Koch, Klaus Szablikowski
  • Patent number: 5886095
    Abstract: The present invention relates to a process for the preparation of branched and/or crosslinked polyamino-ethers in which polyamino-ethers, which are prepared from glycol dichlorohydrins or polyglycol dichlorohydrins and diamines and still contain free chlorohydrin groups, are crosslinked in an essentially aqueous solution under alkaline conditions under the influence of heat.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: March 23, 1999
    Assignee: Wolff Walsrode AG
    Inventors: Roland Bayer, Wolfgang Koch, Klaus Szablikowski
  • Patent number: 5808052
    Abstract: The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for drilling fluid applications.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: September 15, 1998
    Assignee: Wolff Walsrode AG
    Inventors: Klaus Szablikowski, Werner Lange, Jorn-Bernd Pannek, Rene Kiesewetter
  • Patent number: 5639865
    Abstract: The present invention relates to novel thermoplastic, biodegradable polysaccharide ether esters, such as for example cellulose ether esters or starch ether esters, and to the production of such graft copolymers from polysaccharides, epoxides and dicarboxylic acid anhydrides and to the use thereof, for example as moldings, films or coatings.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: June 17, 1997
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Jochen Kalbe, Hanns-Peter Muller, Rainhard Koch, Jurgen Engelhardt, Wolfgang Koch, Klaus Szablikowski, Gunter Weber
  • Patent number: 5635569
    Abstract: Superabsorbent polymers based on partly hydrolysed homopolymers and/or copolymers of acrylonitrile which are cross-linked through the incorporation of polyfunctional monomers, wherein 30 to 80 mol-% of the nitrile groups are converted into carboxylate groups, 20 to 70 mol-% of the nitrile groups are converted into carbonamide groups and 0 mol-% to 20 mol-% of the nitrile groups are unchanged, and the said cross-linked polymers possess a swelling capacity of 700 g/g in water and of up to 60 g/g in physiological saline and a gel strength of from 20 g to 100 g, their preparation and their use.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: June 3, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Sackmann, Siegfried Korte, Sergej Schapowalow, Klaus Szablikowski, Wolfgang Koch
  • Patent number: 5614616
    Abstract: Polysaccharides corresponding to formula (I) ##STR1## in which S is a recurrent monosaccharide unit andB is a group of formula (Ia) attached to the monosaccharide unit S by an O atom ##STR2## are prepared by reaction of polysaccharides with an alkyl halide corresponding to formula (II) ##STR3##
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: March 25, 1997
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Klaus Szablikowski, J orn Breckwoldt
  • Patent number: 5585471
    Abstract: A method for preparing a chloroethylglucopyranose which comprisesa) reacting glucose with from 2 to 10 times the molar amount of chloroethanol at from 100.degree. to 130.degree. C. in the absence of a catalyst, optionally removing water,b) further reacting the product of step (a) at 60.degree. to 90.degree. C. in the presence of an acidic catalyst for from 10 to 600 minutes andc) Separating therefrom the chloroethylglucopyranose.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: December 17, 1996
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Klaus Szablikowski, Martin Lohrie, Wolfgang Koch, Reinhard Langer, Hans-Josef Buysch
  • Patent number: 5484903
    Abstract: The invention relates to a process for the production of carbonic acid esters of polysaccharides which is characterized in that polysaccharides are reacted with carbonic acid esters.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: January 16, 1996
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Klaus Szablikowski, Hans-Josef Buysch, Alexander Klausener
  • Patent number: 5466794
    Abstract: The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structureCell--O--Rwhere Cell--O is the substituted OH group of a polymeric cellulose unit and R is either a monomeric and/or polymeric hydroxyalkylether hydroxycarboxylic acid ester of the structure X:X=--A--B--in which A is a linear polyether chain:A=(--D--O--).sub.nin which D signifies a linear aliphatic branched or unbranched chain with 2 to 11 C atoms and n is a whole number equal to or greater than 1, and B is a linear polyester chain: ##STR1## in which E signifies a linear aliphatic branched or unbranched chain with 2 to 5 C atoms and m is a whole number equal to or greater than 1, or R is equal to A or B or X and a combination thereof in any ratio, or R is equal to H (hydrogen) according to the degree of substitution per anhydroglucose unit (max. 3) with A, B or X, and a process for their production and use of these cellulose derivatives as biodegradable mouldings.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: November 14, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Jochen Kalbe, Hanns P. Muller, Rainhard Koch, Jurgen Engelhardt, Wolfgang Koch, Klaus Szablikowski, Gunter Weber
  • Patent number: 5463036
    Abstract: The present invention relates to carboxymethylcellulose (CMC) having a lower degree of substitution and to its use in textile printing.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: October 31, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Reinhard Kniewske, Rene Kiesewetter, Eugen Reinhardt, Klaus Szablikowski
  • Patent number: 5463034
    Abstract: New polysaccharides have recurring units I or a salt thereof.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: October 31, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Alexander Klausener, Klaus Szablikowski, Klaus Balser, Michaela Wilke
  • Patent number: 5455341
    Abstract: The invention relates to certain highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), to a simplified and economic process for their production and to their use as thickeners in textile printing.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: October 3, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Rene Kiesewetter, Reinhard Kniewske, Eugen Reinhardt, Klaus Szablikowski
  • Patent number: 5446107
    Abstract: A method for the preparation of water-soluble, cationic amine polymers by the continuous or batch-wise reaction of a polymer having primary, secondary or tertiary amine functions in its side chain or primary chain as a starting material, wherein the reaction is carried out with an epoxide, a glycidyl ether or a mixture of different epoxides and glycidyl ethers in aqueous solution without additional solvent at a temperature of 30.degree. to 90.degree. C. and at a pH of 8 to 14 within 3 to 30 minutes, the epoxides or glycidyl ethers are added as one batch or in portions, and after adjusting the pH of the aqueous solution of the cationic polymer, which is >13.5 after the reaction with epoxide or glycidyl ether, using a mineral or carboxylic acid, the product solution is obtained without additional work-up steps.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: August 29, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Klaus Szablikowski, Wolfgang Koch, Heinrich Leffers, Hans-Gunter Poersch-Panke, Branislav Boehmer
  • Patent number: 5442054
    Abstract: The present invention relates to sulphoalkylcellulose derivatives, in particular sulphoethylcellulose, with a degree of substitution by sulphoethyl groups of 1.2 to 2.0 using a one- to three-step, preferably two-step process and the use of the sulphoalkyl-cellulose derivatives as thickening agents or rheology improvers in textile printing.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: August 15, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Rene Kiesewetter, Reinhard Kniewske, Eugen Reinhardt, Klaus Szablikowski
  • Patent number: 5393845
    Abstract: The invention relates to a process for the continuous production of polyacrylonitrile hydrolyzates and to their use as dispersion and grinding aids for pigments and fillers, such as for example kaolin, CaCO.sub.3 or gypsum.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: February 28, 1995
    Assignee: Wolff Walsrode AG
    Inventors: Siegfried Korte, Heinrich Alberts, Branislav Bohmer, Werner Karstens, Wolfgang Koch, Hans-Gunter Poersch-Panke, Klaus Szablikowski
  • Patent number: 5385607
    Abstract: The invention relates to a new class of water-soluble ionic cellulose derivatives and their use as additive for gypsum- and cement-containing compounds.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: January 31, 1995
    Assignee: Wolff Walsrode AG
    Inventors: Rene Kiesewetter, Klaus Szablikowski, Werner Lange