Patents by Inventor Dirk Steinhilber

Dirk Steinhilber 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).

  • Novel Chelate Resins
    Publication number: 20230374180
    Abstract: The invention relates to chelate resins containing aminoalkylphosphinic acid derivatives, to a process for the preparation thereof, and to their use in the recovery and purification of metals, preferably heavy metals, noble metals and rare earths.
    Type: Application
    Filed: September 27, 2021
    Publication date: November 23, 2023
    Applicant: LANXESS Deutschland GmbH
    Inventors: Bernd Koop, Dirk Steinhilber, Joachim Kralik
  • Production of High Purity Lithium Carbonate from Brines
    Publication number: 20220048783
    Abstract: The invention relates to a process for the preparation of high-purity lithium carbonate from brines.
    Type: Application
    Filed: December 16, 2019
    Publication date: February 17, 2022
    Applicant: LANXESS Deutschland GmbH
    Inventors: Dirk Steinhilber, Stefan Neufeind, Shintaro Tzusuki, Joachim Kralik
  • POLYMERIZABLE COMPOSITION
    Publication number: 20200031996
    Abstract: A polymerizable composition comprising a) a cyclic amide formed from a mixture of laurolactam and caprolactam, where the amount of laurolactam is 10% to 35% by weight, based on the total amount of cyclic amide, b) at least one activator, and c) at least one catalyst for polymerization of the cyclic amides.
    Type: Application
    Filed: September 26, 2017
    Publication date: January 30, 2020
    Applicant: LANXESS Deutschland GmbH
    Inventors: Michael WITT, Dominic FUCHS, Michaela FRANK, Dirk STEINHILBER
  • Method for producing a polyglycerol nanogel for the encapsulation and release of biologically active substances
    Patent number: 9770420
    Abstract: A method for producing a polyglycerol nanogel is disclosed, the method comprising the following steps: Mixing an aqueous solution of first polyglycerol macromonomers, which are modified with a first reactive group, with an aqueous solution of second polyglycerol macromonomers, which are modified with a second reactive group, wherein the first reactive group and the second reactive group can react with each other forming a chemical bond; transferring the mixture into an organic non-solvent; and precipitation of a polyglycerol nanogel consisting of first polyglycerol macromonomers and second polyglycerol macromonomers which are covalently bound to each other. According to an aspect of the invention, the method is characterized in that the organic non-solvent is miscible with water and in that the method is carried out without adding surface-active substances.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: September 26, 2017
    Assignee: FREIE UNIVERSITÄT BERLIN
    Inventors: Rainer Haag, Dirk Steinhilber, Wolfgang Friess, Sarah Küchler, Madeleine Witting
  • METHOD FOR PRODUCING A POLYGLYCEROL NANOGEL FOR THE ENCAPSULATION AND RELEASE OF BIOLOGICALLY ACTIVE SUBSTANCES
    Publication number: 20150283094
    Abstract: A method for producing a polyglycerol nanogel is disclosed, the method comprising the following steps: Mixing an aqueous solution of first polyglycerol macromonomers, which are modified with a first reactive group, with an aqueous solution of second polyglycerol macromonomers, which are modified with a second reactive group, wherein the first reactive group and the second reactive group can react with each other forming a chemical bond; transferring the mixture into an organic non-solvent; and precipitation of a polyglycerol nanogel consisting of first polyglycerol macromonomers and second polyglycerol macromonomers which are covalently bound to each other. According to an aspect of the invention, the method is characterized in that the organic non-solvent is miscible with water and in that the method is carried out without adding surface-active substances.
    Type: Application
    Filed: September 5, 2013
    Publication date: October 8, 2015
    Applicant: FREIE UNIVERSITÄT BERLIN
    Inventors: Rainer Haag, Dirk Steinhilber, Wolfgang Friess, Sarah Hedtrich (Born Küchler), Madeleine Witting