Patents by Inventor Miriam-Kathrin Stihulka

Miriam-Kathrin Stihulka 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).

  • Method for the preparation of copolymers of alkyl methacrylates and maleic anhydride
    Patent number: 10703840
    Abstract: A method for the preparation of a copolymer containing at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 4000 to 18000 g/mol proceeds by solution polymerization in the presence of a radical initiator.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: July 7, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Rhishikesh Gokhale, Sandra Muehling, Miriam Kathrin Stihulka, Klaus Schimossek, Frank-Olaf Maehling
  • Method for the preparation of copolymers of alkyl methacrylates and maleic anhydride
    Patent number: 10472444
    Abstract: The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 12, 2019
    Assignee: Evonik Oil Additives GmbH
    Inventors: Rhishikesh Gokhale, Sandra Gebhardt, Miriam Kathrin Stihulka, Klaus Schimossek, Frank-Olaf Maehling
  • Method for the preparation of copolymers of alkyl methacrylates and maleic anhydride
    Patent number: 10465027
    Abstract: A method for the preparation of a sulfur-free copolymer proceeds by solution polymerization in the presence of a radical initiator, wherein the copolymer contains at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: November 5, 2019
    Assignee: Evonik Oil Additives GmbH
    Inventors: Rhishikesh Gokhale, Sandra Muehling, Miriam Kathrin Stihulka, Klaus Schimossek, Frank-Olaf Maehling
  • METHOD FOR THE PREPARATION OF COPOLYMERS OF ALKYL METHACRYLATES AND MALEIC ANHYDRIDE
    Publication number: 20180319919
    Abstract: The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 8, 2018
    Applicant: Evonik Oil Additives GmbH
    Inventors: Rhishikesh GOKHALE, Sandra GEBHARDT, Miriam Kathrin Stihulka, Klaus Schimossek, Frank-Olaf Maehling
  • METHOD FOR THE PREPARATION OF COPOLYMERS OF ALKYL METHACRYLATES AND MALEIC ANHYDRIDE
    Publication number: 20170369615
    Abstract: A method for the preparation of a sulfur-free copolymer proceeds by solution polymerization in the presence of a radical initiator, wherein the copolymer contains at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol.
    Type: Application
    Filed: December 16, 2015
    Publication date: December 28, 2017
    Applicant: Evonik Oil Additives GmbH
    Inventors: Rhishikesh GOKHALE, Sandra MUEHLING, Miriam Kathrin STIHULKA, Klaus SCHIMOSSEK, Frank-Olaf MAEHLING
  • METHOD FOR THE PREPARATION OF COPOLYMERS OF ALKYL METHACRYLATES AND MALEIC ANHYDRIDE
    Publication number: 20170362360
    Abstract: A method for the preparation of a copolymer containing at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 4000 to 18000 g/mol proceeds by solution polymerization in the presence of a radical initiator.
    Type: Application
    Filed: December 16, 2015
    Publication date: December 21, 2017
    Applicant: Evonik Oil Additives GmbH
    Inventors: Rhishikesh GOKHALE, Sandra MUEHLING, Miriam Kathrin STIHULKA, Klaus SCHIMOSSEK, Frank-Olaf MAEHLING
  • Polyalkyl(meth)acrylate for improving lubricating oil properties
    Patent number: 9777098
    Abstract: The invention relates to a polyalkyl (meth) acrylate for improving lubricating oil properties, which comprises repetition units which are derived from (meth) acrylates having 6 to 22 carbon atoms in the alcohol residues, and repetition units which are derived from amine derivatives of an ethylenically unsaturated monomer. The invention further relates to methods for producing and using the present polyalkyl (meth) acrylate.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: October 3, 2017
    Assignee: Evonik Oil Additives GmbH
    Inventors: Boris Eisenberg, Dieter Janssen, Ellen Suchert, Miriam Kathrin Stihulka, Lucas Voigt
  • Use of ester group-including polymers as antifatigue additives
    Patent number: 8859472
    Abstract: 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: Grant
    Filed: June 20, 2008
    Date of Patent: October 14, 2014
    Assignee: Evonik RohMax Additives GmbH
    Inventors: Torsten Stoehr, Michael Mueller, Thorsten Bartels, Christoph Wincierz, Klaus Schimossek, Michael Neusius, Dieter Janssen, Miriam-Kathrin Stihulka
  • POLYALKYL(METH)ACRYLATE FOR IMPROVING LUBRICATING OIL PROPERTIES
    Publication number: 20130079265
    Abstract: The invention relates to a polyalkyl (meth) acrylate for improving lubricating oil properties, which comprises repetition units which are derived from (meth) acrylates having 6 to 22 carbon atoms in the alcohol residues, and repetition units which are derived from amine derivatives of an ethylenically unsaturated monomer. The invention further relates to methods for producing and using the present polyalkyl (meth) acrylate.
    Type: Application
    Filed: June 27, 2011
    Publication date: March 28, 2013
    Applicant: Evonik Oil Additives GmbH
    Inventors: Boris Eisenberg, Dieter Janssen, Ellen Suchert, Miriam Kathrin Stihulka, Lucas Voigt
  • USE OF COMB POLYMERS AS ANTIFATIGUE ADDITIVES
    Publication number: 20110306533
    Abstract: The invention relates to the use of comb polymers comprising repeating units in the main chain which repeating units are derived from polyolefin-based macromonomers having a molecular weight of at least 500 g/mol, and repeating units which are derived from low-molecular monomers having a molecular weight of less than 500 g/mol as antifatigue additives in lubricants. The invention further relates to novel comb polymers and methods for the production thereof and to lubricating oils comprising said comb polymers.
    Type: Application
    Filed: February 25, 2010
    Publication date: December 15, 2011
    Applicant: Evonik Rohmax Additives GmbH
    Inventors: Boris Eisenberg, Torsten Stoehr, Dieter Janssen, Miriam Kathrin Stihulka
  • USE OF ESTER GROUP-INCLUDING POLYMERS AS ANTIFATIGUE ADDITIVES
    Publication number: 20110237473
    Abstract: 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: Application
    Filed: June 20, 2008
    Publication date: September 29, 2011
    Applicant: EVONIK ROHMAX ADDITIVES GMBH
    Inventors: Torsten Stoehr, Michael Mueller, Thorsten Bartels, Christoph Wincierz, Klaus Schimossek, Michael Neusius, Dieter Janssen, Miriam-Kathrin Stihulka