Patents by Inventor Nicole Lichterfeld-Weber

Nicole Lichterfeld-Weber 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).

  • Process for treating subterranean oil-bearing formations comprising carbonate rocks
    Patent number: 10494907
    Abstract: Process for treating subterranean oil-bearing formations comprising carbonate rocks with an aqueous composition comprising cationic ammonium salts comprising four hydrocarbon radicals wherein at least one of the hydrocarbon radicals is substituted by an OH-group. The process may be a process for enhanced oil recovery, fracturing, acidizing or antiscale treatment.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: December 3, 2019
    Assignee: BASF SE
    Inventors: Vandana Kurkal-Siebert, Guenter Oetter, Nicole Lichterfeld-Weber
  • PROCESS FOR TREATING SUBTERRANEAN OIL-BEARING FORMATIONS COMPRISING CARBONATE ROCKS
    Publication number: 20150354332
    Abstract: Process for treating subterranean oil-bearing formations comprising carbonate rocks with an aqueous composition comprising cationic ammonium salts comprising four hydrocarbon radicals wherein at least one of the hydrocarbon radicals is substituted by an OH-group. The process may be a process for enhanced oil recovery, fracturing, acidizing or antiscale treatment.
    Type: Application
    Filed: January 24, 2014
    Publication date: December 10, 2015
    Inventors: Vandana KURKAL-SIEBERT, Guenter OETTER, Nicole LICHTERFELD-WEBER
  • Alkylglycol alkoxylates or alkyldiglycol alkoxylates, mixtures thereof with tensides and their use
    Publication number: 20050049167
    Abstract: The invention relates to alkylglycol alkoxylates and alkyldiglycol alkoxylates that are obtainable by alkoxylating C4-8 alkylglycols or diglycols with C2-5 alkoxides up to an average alkoxylation degree of 1 to 8, based on the C4-8alkylglycols or diglycols. The invention further relates to mixtures from C2-5 alkoxylates of C4-8 alkylgycols or -diglycols that have an average alkoxylation degree of 1 to 8 and tensides that have an interfacial tension of less than 45 mN/m at 20° C. when dissolved in an amount of 5 g/l of water, and/or to diyhdroxyalkins or derivatives thereof.
    Type: Application
    Filed: January 21, 2003
    Publication date: March 3, 2005
    Inventors: Ralf Noerenberg, Gunter Oetter, Jurgen Tropsch, Helmut Gumbel, Nicole Lichterfeld-Weber, Hubertus Kroner, Hans-Peter Seelmann-Eggebert