Patents by Inventor Klaus Kwetkat

Klaus Kwetkat 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: 9757701
    Abstract: The object of the present invention is a method for producing oil-in-water (O/W) emulsions from self-emulsifying O/W gel concentrates without agitation, such as stirring, or in a laminar flow field.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: September 12, 2017
    Assignee: Sasol Germany GmbH
    Inventors: Klaus Kwetkat, Britta Jakobs, Gerd M. Dahms
  • Publication number: 20110033555
    Abstract: The present invention relates to a method of producing wax/oil-in-water (O/W) dispersions of self-emulsifying O/W gel concentrates without stirring or in a laminar flow field.
    Type: Application
    Filed: December 19, 2008
    Publication date: February 10, 2011
    Inventors: Klaus Kwetkat, Ursula Michel
  • Publication number: 20110033413
    Abstract: The object of the present invention is a method for producing oil-in-water (O/W) emulsions from self-emulsifying gel concentrates without agitation, such as stirring, or in a laminar flow field.
    Type: Application
    Filed: December 19, 2008
    Publication date: February 10, 2011
    Inventors: Klaus Kwetkat, Britta Jakobs, Gerd M. Dahms
  • Patent number: 7393817
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: July 1, 2008
    Assignee: Sasol Germany GmbH
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Publication number: 20080051472
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Application
    Filed: September 12, 2007
    Publication date: February 28, 2008
    Inventors: Klaus Kwetkat, Gerd Dahms
  • Publication number: 20050031653
    Abstract: This invention relates to sprayable low-viscous O/W emulsions which can be prepared from at least two phases by using a hydrophobic phase comprising gemini surfactants and a hydrophilic phase comprising gemini surfactants with addition of solid particles, a foaming surfactant, or an antitranspirant.
    Type: Application
    Filed: August 28, 2002
    Publication date: February 10, 2005
    Inventors: Klaus Kwetkat, Gerd Dahms
  • Publication number: 20040176266
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Application
    Filed: March 10, 2004
    Publication date: September 9, 2004
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Patent number: 6710022
    Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: March 23, 2004
    Assignee: Sasol Germany GmbH
    Inventors: Klaus Kwetkat, Gerd H. Dahms
  • Publication number: 20040033913
    Abstract: This invention relates to aqueous, flowable pearly luster concentrates containing one or more pearlescent component(s), gemini surfactant(s), and at least one additional surfactant.
    Type: Application
    Filed: May 28, 2003
    Publication date: February 19, 2004
    Inventors: Gerd H Dahms, Klaus Kwetkat
  • Patent number: 6608230
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 19, 2003
    Assignee: WE-DEA Aktiengesellschaft für Mineraloel und Chemie
    Inventors: Mark Rüsch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Patent number: 6593376
    Abstract: A process for preparing amphiphilic compounds having at least two hydrophilic and at least two hydrophobic groups by reacting an olefinic substrate having at least two double bonds with an organic hydroperoxide to form an oxirane ring, opening, the oxirane ring with an alcohol in the presence of a catalyst system comprising a molybdenum compound as a first catalyst component and a second catalyst component selected from the group consisting of boron trifluoride, alumina, 1,8-diazzabicyclo-(5.4.0)-undec-7-ene, 1,4-diazabicyclo-(2,2,2)-octane.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 15, 2003
    Assignee: SASOL Germany GmbH
    Inventors: Mark Rüsch gen. Klaas, Klaus Kwetkat, Siegfried Warwel
  • Publication number: 20020072637
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 13, 2002
    Inventors: Mark Rusch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Patent number: 6380439
    Abstract: A single-stage method for producing &agr;-hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with a compound selected from the group consisting of boron trifluoride, aluminum oxides, 1,8-diazabicyclo-[5.4.0]-undec-7-ene or 1,4-diazabicyclo-[2.2.2]-octane, and mixtures thereof is used as a catalyst system.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: April 30, 2002
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Mark Rüsch gen. Klaas, Siegfried Warwel, Hans-Martin Zillmann, Klaus Kwetkat
  • Patent number: 6342625
    Abstract: The invention relates to amphiphilic compounds of general formula (I), (R1, R3—C1-C22 hydrocarbon radical, R2—spacer, X, Y—functional groups, Z—1 to 10) with at least two hydrophilic and at least two hydrophobic groups on the basis of amides. The amphiphilic compounds of this invention are highly surface-active and are suitable in particular as emulsifiers, demulsifiers, detergents, dispersants and hydrotropics in industry and household, e.g. in the fields of metalworking, ore extraction, surface treatment, washing and cleaning, cosmetics, medicine and foodstuff processing and preparation.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: January 29, 2002
    Assignee: RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    Inventors: Klaus Kwetkat, Wulf Ruback
  • Patent number: 6323363
    Abstract: The invention concerns amphiphilic compounds of general formula (I) with at least two hydrophilic and at least two hydrophobic groups based on dicarboxylic acid diamides. The disclosed amphiphilic compounds mostly have a surfactant activity and are useful as emulsifiers, demulsifiers, detergents, dispersants, and hydrotropic agents for industry and household, for example in the fields of metal working, ore mining, surface finishing, washing and cleaning, cosmetics, medicine, foodstuff processing and preparation.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: November 27, 2001
    Assignee: RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    Inventors: Klaus Kwetkat, Ulrike Jacobs, Silvia Scholz
  • Patent number: 6316396
    Abstract: The invention relates to amphiphilic compounds of the general formula (I) with at least two hydrophilic and at least two hydrophobic groups based on di, oligo or polyolethers. The amphiphilic compounds of this invention are highly surface active and are suitable as emulsifiers, demulsifiers, detergents, dispersants and hydrotropes for industrial and domestic purposes, e.g. in the fields of metalworking, ore separation, surface treatment, washing and cleaning, cosmetics, medicine and food processing and preparation.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: November 13, 2001
    Assignee: RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    Inventors: Klaus Kwetkat, Wolfgang Schröder
  • Patent number: 6211409
    Abstract: A process is disclosed for preparing di- or oligoamide alkoxylates. Diamides are prepared from carboxylic acids or carboxylic acid alkyl esters and di-, oligo-, or polyamines and are alkoxylated as a melt directly after their preparation, without any further intermediate preparation process.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: April 3, 2001
    Assignee: RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    Inventors: Ulrike Jacobs, Uwe Kaltwasser, Klaus Kwetkat, Ernst-Jürgen Lehmann
  • Patent number: 6156721
    Abstract: The present invention relates to the use of anionic gemini tensides of the formula (I) ##STR1## in which R.sup.1 and R.sup.3 are, mutually independently, a hydrocarbon radical with 1 to 22 carbon atoms, R.sup.2 is a spacer containing 0 to 100 alkoxy groups, and X and Y, mutually independently, are functional groups and the degree of substitution Z=1 to 10, in washing, cleaning and body care agents in which the proportion of said tensides amounts to at least 0.1%.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: December 5, 2000
    Assignee: RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    Inventors: Klaus Kwetkat, Michael Brock, Herbert Koch
  • Patent number: 6121482
    Abstract: The invention concerns amphiphilic compounds of general formula (I), in which R.sup.1 and R.sup.3 each represent a C.sub.1 -C.sub.22 hydrocarbon residue, R.sup.2 is a spacer and X and Y are functional groups. The proposed compounds have at least two hydrophilic and at least two hydrophobic groups based on dicarboxylic acid diamides. The amphiphilic compounds according to the invention are mostly surface-active and are especially suitable for use as emulsifiers, demulsifies, detergents, dispergents and hydrotropic agents in industry and households, for example, in the treatment of metals, ore processing, surface finishing, washing, cleaning, cosmetics, medicine and food processing and preparation.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: September 19, 2000
    Assignee: Huels Aktiengesellschaft
    Inventors: Klaus Kwetkat, Herbert Koch, Wulf Ruback
  • Patent number: 6066755
    Abstract: The invention relates to amphiphilic compounds of the general formula I ##STR1## which have at least two hydrophilic and at least two hydrophobic groups and are based on carbonic acid derivatives.The spacer A is an aliphatic, cyclic or acyclic or an aromatic di-, oligo- or polycarbonate of the formula II: ##STR2## The amphiphilic compounds according to this invention are mostly surface-active and are suitable as emulsifiers, demulsifiers, detergents, dispersants and hydrotropes for industrial and domestic use, in particular in the fields of metalworking, ore extraction, surface finishing, plastics processing, washing and cleaning, cleaning of hard surfaces, manual dishwashing compositions, cosmetics, medicine and food processing and preparation.
    Type: Grant
    Filed: June 22, 1998
    Date of Patent: May 23, 2000
    Assignee: Huels Aktiengesellschaft
    Inventors: Herbert Koch, Klaus Kwetkat