Patents by Inventor Sandra GEBHARDT

Sandra GEBHARDT 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: 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
    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