Patents by Inventor Torsten Stoehr
Torsten Stoehr 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).
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Patent number: 10131776Abstract: The present invention describes a composition comprising at least one polyalkyl(meth)acrylate polymer having a number average molecular weight Mn of from 1000 to 10000 g/mol and a polydispersity Mw/Mn of from 1 to 8 and at least one ethylene vinyl acetate copolymer comprising units being derived from at least one alkyl (meth)acrylate having 1 to 30 carbon atoms in the alkyl residue. The composition is useful as cold flow improver in fossil fuel oil and or biodiesel fuel oil.Type: GrantFiled: July 21, 2010Date of Patent: November 20, 2018Assignee: EVONIK OIL ADDITIVES GmbHInventors: Ronny Sondjaja, Rene Koschabek, Markus Weber, Jane Benito, Jian Mike Liu, Torsten Stoehr
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Patent number: 9783630Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units which are derived from polyolefin-based macromonomers, and repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth)acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di)alkyl fumarates having 1 to 10 carbon atoms in the alcohol group, (di)alkyl maleates having 1 to 10 carbon atoms in the alcohol group and mixtures of these monomers, where the molar degree of branching is in the range of 0.Type: GrantFiled: April 10, 2008Date of Patent: October 10, 2017Assignee: Evonik Oil Additives GmbHInventors: Torsten Stoehr, Dieter Janssen, Juergen Schnabel, Boris Eisenberg, Hans Goerlitzer, Michael Mueller
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Patent number: 9617495Abstract: The present invention relates to a transmission lubricant comprising at least 30% by weight of polyalkyl (meth)acrylate. The present invention further describes polyalkyl (meth)acrylates for use in lubricants and also processes for preparing them and their use. The present lubricants can be used particularly in wind turbine transmissions.Type: GrantFiled: February 24, 2011Date of Patent: April 11, 2017Assignee: Evonik Oil Additives GmbHInventors: Reza Ghahary, Juergen Gebhardt, Thilo Krapfl, Michael Mueller, Thomas Schimmel, Roland Schweder, Torsten Stoehr, Christoph Wincierz
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Patent number: 9540575Abstract: The present invention relates to a lubricant composition for a process for reducing the paraffin content of mineral oil compositions, by providing a mineral oil composition with a dewaxing aid, cooling to form a paraffin precipitate and at least partly removing the paraffin precipitate formed. The dewaxing aid used is a copolymer mixture comprising at least three copolymers, the copolymers differing in the composition of the repeat units.Type: GrantFiled: February 6, 2012Date of Patent: January 10, 2017Assignee: Evonik Oil Additives GmbHInventors: Rene Koschabek, Torsten Stoehr, Markus Weber, Andre Unglert, Wolfgang Tschepat
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Patent number: 9434903Abstract: The present invention relates to a component part comprising at least two components movable with respect to one another, between the surfaces of which is provided a film formed by a lubricant oil composition, the surface of at least one of the movable components being formed at least partly by a diamond-like-carbon layer (DLC layer) and the lubricant oil composition comprising at least one polymer comprising repeat units derived from amine derivatives of at least one polar ethylenically unsaturated monomer.Type: GrantFiled: May 10, 2012Date of Patent: September 6, 2016Assignee: Evonik Oil Additives GmbHInventors: Boris Eisenberg, Torsten Stoehr
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Publication number: 20160097017Abstract: The present invention relates to a transmission oil formulation comprising a base oil and a copolymer obtained by free-radical polymerization from a monomer composition. The invention also relates to the use of the transmission oil formulation as transmission oil for reducing the fuel consumption of motor vehicles.Type: ApplicationFiled: April 8, 2014Publication date: April 7, 2016Applicant: EVONIK OIL ADDITIVES GMBHInventors: Boris EISENBERG, Torsten STÖHR
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Publication number: 20150322322Abstract: The present invention relates to the use of a liquid composition as heat transfer fluid, characterized in that the liquid composition comprises polymers derived from at least an ethylenically unsaturated monomer or a mixture of ethylenically unsaturated monomers. Preferably, the liquid composition is used as a heat transfer fluid for electrical equipment.Type: ApplicationFiled: December 4, 2013Publication date: November 12, 2015Applicant: EVONIK OIL ADDITIVES GMBHInventors: Ronny SONDJAJA,, Reza GHAHARY, Torsten Stoehr, Juergen GEBHARDT, Ines MUELLER, Aidan S ROSE
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Publication number: 20150232783Abstract: The present invention describes a composition comprising: (A) at least one polyalkyl (meth) acrylate polymer having a number average molecular weight Mn of from 15000 to 75000 g/mol; (B) at least one ethylene vinyl acetate copolymer comprising units being derived from at least one alkyl (meth) acrylate having 1 to 30 carbon atoms in the alkyl residue; (C) a phenolic type anti-oxidant; (D) a mixture stabilizer; and (E) a glycol ether solvent. The composition is useful as cold flow improver and oxidation stabilizer in vegetable oils and animal fats.Type: ApplicationFiled: September 6, 2013Publication date: August 20, 2015Applicant: EVONIK OIL ADDITIVES GMBHInventors: Rhishikesh GOKHALE, Ronny SONDJAJA, Lisa BRÜNNER, Frank-Olaf MÄHLING, Justin August LANGSTON, Torsten STÖHR, Jane BENITO, Gwen TEH
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Patent number: 9080124Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.Type: GrantFiled: June 23, 2005Date of Patent: July 14, 2015Assignee: EVONIK ROHMAX ADDITIVES GmbHInventors: Markus Scherer, Klaus Hedrich, Alexander Dardin, Michael Mueller, Torsten Stoehr, Boris Eisenberg
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Patent number: 8859472Abstract: The present invention relates to the use of ester group-including polymers having at least one nonpolar segment P and at least one polar segment D, where the polar segment D includes at least 8 repeating units, and the proportion of dispersing repeating units in the polar segment D is at least 30% by weight based on the weight of the polar segment D, as antifatigue additive in lubricants.Type: GrantFiled: June 20, 2008Date of Patent: October 14, 2014Assignee: Evonik RohMax Additives GmbHInventors: Torsten Stoehr, Michael Mueller, Thorsten Bartels, Christoph Wincierz, Klaus Schimossek, Michael Neusius, Dieter Janssen, Miriam-Kathrin Stihulka
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Publication number: 20140274835Abstract: The invention concerns a method of increasing the dynamic coefficient of friction in an oil-lubricated friction clutch by using a lubricating oil containing at least one specific copolymer, the presence of which develops higher dynamic friction levels in the clutch.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Inventors: Raymond F. Watts, Joe R. Noles, JR., Michael Müller, Torsten Stöhr, Boris Eisenberg
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Patent number: 8722601Abstract: Copolymers are obtainable by polymerizing a monomer composition composed of a) 0% to 40% by weight of one or more ethylenically unsaturated ester compounds of the formula (I), b) 10% to 99.9% by weight of one or more ethylenically unsaturated ester compounds of the formula (II), c) 0% to 80% by weight of one or more ethylenically unsaturated ester compounds of the formula (III), d) 0.1% to 30% by weight of one or more ethylenically unsaturated, polar ester compounds of the formula (IV), e) 0% to 50% by weight of comonomer, based in each case on the total weight of the ethylenically unsaturated monomers.Type: GrantFiled: August 19, 2011Date of Patent: May 13, 2014Assignee: RohMax Additives GmbHInventors: Michael Mueller, Torsten Stoehr, Boris Eisenberg
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Publication number: 20140005084Abstract: The present invention relates to a component part comprising at least two components movable with respect to one another, between the surfaces of which is provided a film formed by a lubricant oil composition, the surface of at least one of the movable components being formed at least partly by a diamond-like-carbon layer (DLC layer) and the lubricant oil composition comprising at least one polymer comprising repeat units derived from amine derivatives of at least one polar ethylenically unsaturated monomer.Type: ApplicationFiled: May 10, 2012Publication date: January 2, 2014Applicant: Evonik Oil Additives GmbHInventors: Boris Eisenberg, Torsten Stoehr
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Publication number: 20130306523Abstract: The present invention relates to a lubricant composition for a process for reducing the paraffin content of mineral oil compositions, by providing a mineral oil composition with a dewaxing aid, cooling to form a paraffin precipitate and at least partly removing the paraffin precipitate formed. The dewaxing aid used is a copolymer mixture comprising at least three copolymers, the copolymers differing in the composition of the repeat units.Type: ApplicationFiled: February 6, 2012Publication date: November 21, 2013Applicant: Evonik Oil Additives GmbHInventors: Rene Koschabek, Torsten Stoehr, Markus Weber, Andre Unglert, Wolfgang Tschepat
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Publication number: 20130252866Abstract: The present invention relates to copolymers comprising ester groups and having at least one nonpolar segment P and at least one polar segment D, the polar segment D having at least 8 repeat units and the proportion by weight of dispersing repeat units in the polar segment D being at least 30%, based on the weight of the polar segment D, wherein the copolymer comprising ester groups is obtainable by NMP (nitroxide mediated polymerization). The invention further relates to lubricant oils having improved friction properties and comprising said copolymers.Type: ApplicationFiled: February 9, 2012Publication date: September 26, 2013Applicant: Evonik Oil Additives GmbHInventors: Torsten Stoehr, Boris Eisenberg, Ellen Suchert
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Publication number: 20130229016Abstract: The present invention relates to a transmission lubricant comprising at least 30% by weight of polyalkyl (meth)acrylate. The present invention further describes polyalkyl (meth)acrylates for use in lubricants and also processes for preparing them and their use. The present lubricants can be used particularly in wind turbine transmissions.Type: ApplicationFiled: February 24, 2011Publication date: September 5, 2013Applicant: Evonik RohMax Additives GmbHInventors: Reza Ghahary, Juergen Gebhardt, Thilo Krapfl, Micahel Mueller, Thomas Schimmel, Roland Schweder, Torsten Stoehr, Christoph Wincierz
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Publication number: 20130219868Abstract: 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: ApplicationFiled: October 28, 2011Publication date: August 29, 2013Applicant: Evonik Oil Additives GmbHInventors: 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
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Publication number: 20120258899Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units derived from polyolefin-based macromonomers with a molecular weight of at least 500 g/mol, and repeat units derived from low molecular weight monomers with a molecular weight less than 500 g/mol, for improving the load-bearing capacity of hydraulic fluids. Furthermore, the present invention describes new hydraulic fluids.Type: ApplicationFiled: June 20, 2012Publication date: October 11, 2012Applicant: EVONIK ROHMAX ADDITIVES GMBHInventors: Boris Eisenberg, Roland Schweder, Michael Alibert, Torsten Stöhr
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Publication number: 20120174474Abstract: The present invention describes a composition comprising at least one polyalkyl(meth)acrylate polymer having a number average molecular weight Mn of from 1000 to 10000 g/mol and a polydispersity Mw/Mn of from 1 to 8 and at least one ethylene vinyl acetate copolymer comprising units being derived from at least one alkyl (meth)acrylate having 1 to 30 carbon atoms in the alkyl residue. The composition is useful as cold flow improver in fossil fuel oil and or biodiesel fuel oil.Type: ApplicationFiled: July 21, 2010Publication date: July 12, 2012Applicant: Evonik RohMax Additives GmbHInventors: Ronny Sondjaja, Rene Koschabek, Markus Weber, Jane Nenito, Jian Mike Liu, Torsten Stoehr
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Patent number: 8163682Abstract: (EN) The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms.Type: GrantFiled: August 4, 2006Date of Patent: April 24, 2012Assignee: Evonik Rohmax Additives GmbHInventors: Torsten Stoehr, Michael Mueller, Boris Eisenberg, Harald Becker, Axel Mueller