Patents by Inventor Alexander Dardin

Alexander Dardin 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: 9080124
    Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: July 14, 2015
    Assignee: EVONIK ROHMAX ADDITIVES GmbH
    Inventors: Markus Scherer, Klaus Hedrich, Alexander Dardin, Michael Mueller, Torsten Stoehr, Boris Eisenberg
  • Publication number: 20130219868
    Abstract: The present invention describes a motor designed for biodiesel compatibility comprising a particulate filter, a motor control unit being able to inject fuel to the engine in order to increase the exhaust temperature, and a lubricant composition, characterized in that the lubricant composition comprises at least one ester group containing polymer.
    Type: Application
    Filed: October 28, 2011
    Publication date: August 29, 2013
    Applicant: Evonik Oil Additives GmbH
    Inventors: Michael Alibert, Thorsten Bartels, Julien Couet, Alexander Dardin, Daniel H. Deneen, Brian Hess, Michael Mueller, Christian Daniel Georges Neveu, Gerhard Renner, Torsten Stoehr, Christoph Wincierz
  • Patent number: 8288327
    Abstract: The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR?, in which R? represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.
    Type: Grant
    Filed: January 24, 2004
    Date of Patent: October 16, 2012
    Assignee: Evonik Rohmax Additives GmbH
    Inventors: Alexander Dardin, Michael Mueller, Boris Eisenberg
  • Patent number: 8288583
    Abstract: The present invention relates to processes for preparing carboxylic acid derivatives, comprising the reaction of at least one carboxylic acid and/or of a carboxylic acid derivative with at least one alcohol and/or an amine in the presence of a metal-containing catalyst, wherein, after the reaction has ended, the metal-containing catalyst is contacted with water and a superabsorbent, the contacting of the catalyst with the water leading to hydrolysis of the catalyst. The present invention further relates to the use of superabsorbents for removing a metal-containing catalyst from a mixture after hydrolysis of the catalyst.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: October 16, 2012
    Assignee: Evonik Rohmax Additives GmbH
    Inventors: Uwe Boehmke, Klaus Schimossek, Detlef Bloos, Michael Neusius, Stephan Massoth, Guenther Graeff, Alexander Dardin, Matthias Fischer, Volker Stephan
  • Patent number: 7645842
    Abstract: The invention relates to a method for radical polymerization of one or several ethylenically unsaturated compounds, characterized in that it consists in providing at least 80.8 percent by weight ethylenically unsaturated compounds in relation to the total weight of the ethylenically unsaturated compounds, adding at least one polymerization initiator for radical polymerization in at least two steps, wherein more polymerization initiator is added in the second step than in the first.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: January 12, 2010
    Assignee: Rohmax Additives GmbH
    Inventors: Francois Acker, Markus Scherer, Alexander Dardin, Stephan Massoth, Bernd Amrhein, Detlef Bloos, Valerie Dittgen, Alain Roos, Jean-Marc Beiner
  • Publication number: 20090182145
    Abstract: The present invention relates to processes for preparing carboxylic acid derivatives, comprising the reaction of at least one carboxylic acid and/or of a carboxylic acid derivative with at least one alcohol and/or an amine in the presence of a metal-containing catalyst, wherein, after the reaction has ended, the metal-containing catalyst is contacted with water and a superabsorbent, the contacting of the catalyst with the water leading to hydrolysis of the catalyst. The present invention further relates to the use of superabsorbents for removing a metal-containing catalyst from a mixture after hydrolysis of the catalyst.
    Type: Application
    Filed: June 1, 2007
    Publication date: July 16, 2009
    Applicant: EVONIK ROHMAX ADDITIVES GMBH
    Inventors: Uwe Böhmke, Klaus Schimossek, Detlef Bloos, Michael Neusius, Stephan Massoth, Günther Gräff, Alexander Dardin, Matthias Fischer, Volker Stephan
  • Patent number: 7452932
    Abstract: The present invention relates to a polymer dispersion having high stability, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one compound comprising (oligo)oxyalkyl groups.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: November 18, 2008
    Assignee: RohMax Additives GmbH
    Inventors: Markus Scherer, Alexander Dardin, Wolfgang Tschepat, Stephan Massoth
  • Publication number: 20080132663
    Abstract: The invention relates to a method for radical polymerization of one or several ethylenically unsaturated compounds, characterized in that it consists in providing at least 80.8 percent by weight ethylenically unsaturated compounds in relation to the total weight of the ethylenically unsaturated compounds, adding at least one polymerization initiator for radical polymerization in at least two steps, wherein more polymerization initiator is added in the second step than in the first.
    Type: Application
    Filed: August 1, 2005
    Publication date: June 5, 2008
    Applicant: Rohmax Additives GMBH
    Inventors: Francois Acker, Markus Scherer, Alexander Dardin, Stephan Massoth, Bernd Amrhein, Detlef Bloos, Valerie Dittgen, Alain Roos, Jean-Marc Beiner
  • Publication number: 20070213237
    Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.
    Type: Application
    Filed: June 23, 2005
    Publication date: September 13, 2007
    Applicant: ROHMAX ADDITIVES GMBH
    Inventors: Markus Scherer, Klaus Hedrich, Alexander Dardin, Michael Muller, Thorsten Stoehr, Boris Eisenberg
  • Publication number: 20060189490
    Abstract: The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR?, in which R? represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.
    Type: Application
    Filed: January 24, 2004
    Publication date: August 24, 2006
    Inventors: Alexander Dardin, Michael Mueller, Boris Eisenberg
  • Publication number: 20050261143
    Abstract: The present invention relates to a polymer dispersion having high stability, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one compound comprising (oligo)oxyalkyl groups.
    Type: Application
    Filed: August 27, 2003
    Publication date: November 24, 2005
    Applicant: ROHMAX ADDITIVES GMBH
    Inventors: Markus Scherer, Alexander Dardin, Wolfgang Tschepat, Stephan Massoth
  • Patent number: 6458750
    Abstract: The invention relates to engine oil compositions with reduced deposit-formation tendency which contain between 0.05 and 10% by weight, in relation to the total weight of the engine oil composition, of an alkyl alkoxylate of formula (I), in which R 1 , R 2 and R 3 independently are hydrogen or a hydrocarbon rest with up to 40 carbon atoms; R 4 is hydrogen, a methyl or ethyl rest; L is a linking group; n is a whole number between 4 and 40; A is an alkoxy group with between 2 and 25 recurring units derived from ethylene oxide, propylene oxide and/or butylene oxide and comprises homopolymers and statistical copolymers of at least two of the above compounds; and z is 1 or 2. The nonpolar part of compound (I) of the formula (II) contains at least 9 carbon atoms. The invention also relates to the preparation of such engine oils and to the use of alkyl alkoxylates of formula (I) for the reduction of deposit formation.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: October 1, 2002
    Assignee: Rohmax Additives GmbH
    Inventors: Alexander Dardin, Klaus Hedrich, Stephan Massoth, Boris Eisenberg, Stephan Fengler