Patents by Inventor David HAFNER

David HAFNER 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 of preparing a polyrotaxane and polyrotaxane
    Patent number: 11248092
    Abstract: In one embodiment the invention relates to a method of preparing a polyrotaxane, said method comprising: performing a radical copolymerization of at least (a) a first polymerizable monomer having a stopper group, and of at least (b) a second polymerizable hydrophobic monomer, wherein said second monomer is complexed by a ring-shaped molecule, and of at least (c) a third polymerizable hydrophilic monomer; wherein during said copolymerization a copolymer threading said ring-shaped molecule is formed, wherein during said copolymerization said first monomer having a stopper group is incorporated into the chain of said copolymer at least partially between the ends thereof, and wherein said stopper groups prevent said ring-shaped molecule from disassembling from the copolymer; and wherein the amount of said first monomer having a stopper group is of from 0.1 mol % to 20 mol % based on 100 mol % of the total amount of polymerizable monomers.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: February 15, 2022
    Assignee: UNIVERSITAET DES SAARLANDES
    Inventors: Budiman Ali, Carsten Becker-Willinger, Gisela Heppe, Nina Mueller, Peter-William De Oliveira, Gerhard Wenz, Gergely Kali, Harley Eisenbarth, Devid Hero, David Hafner, Jessica Hilschmann
  • Methods of calibrating a camera of a vehicle and systems
    Patent number: 10902641
    Abstract: A method for calibrating a camera of a vehicle is provided. The method comprises: generating a camera calibration matrix comprising a first, a second and a third column, wherein the first column of the camera calibration matrix is obtained based on the obtained focus of expansion points, the third column of the camera calibration matrix is obtained based on the obtained plane normal vectors and a second column of the camera calibration matrix corresponding to the cross-product of the first and the third column of the camera calibration matrix is obtained. Then, the camera is calibrated using the obtained camera calibration matrix.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: January 26, 2021
    Assignee: FICOSA ADAS, S.L.U.
    Inventors: David Hafner, Taner Gungor, Sebastian Carreno
  • METHOD OF PREPARING A POLYROTAXANE AND POLYROTAXANE
    Publication number: 20190322814
    Abstract: In one embodiment the invention relates to a method of preparing a polyrotaxane, said method comprising: performing a radical copolymerization of at least (a) a first polymerizable monomer having a stopper group, and of at least (b) a second polymerizable hydrophobic monomer, wherein said second monomer is complexed by a ring-shaped molecule, and of at least (c) a third polymerizable hydrophilic monomer; wherein during said copolymerization a copolymer threading said ring-shaped molecule is formed, wherein during said copolymerization said first monomer having a stopper group is incorporated into the chain of said copolymer at least partially between the ends thereof, and wherein said stopper groups prevent said ring-shaped molecule from disassembling from the copolymer; and wherein the amount of said first monomer having a stopper group is of from 0.1 mol % to 20 mol % based on 100 mol % of the total amount of polymerizable monomers.
    Type: Application
    Filed: December 21, 2017
    Publication date: October 24, 2019
    Inventors: Budiman ALI, Carsten BECKER-WILLINGER, Gisela HEPPE, Nina MUELLER, Peter-William DE OLIVEIRA, Gerhard WENZ, Gergely KALI, Harley EISENBARTH, Devid HERO, David HAFNER, Jessica HILSCHMANN
  • METHODS OF CALIBRATING A CAMERA OF A VEHICLE AND SYSTEMS
    Publication number: 20190259178
    Abstract: A method for calibrating a camera of a vehicle is provided. The method comprises: generating a camera calibration matrix comprising a first, a second and a third column, wherein the first column of the camera calibration matrix is obtained based on the obtained focus of expansion points, the third column of the camera calibration matrix is obtained based on the obtained plane normal vectors and a second column of the camera calibration matrix corresponding to the cross-product of the first and the third column of the camera calibration matrix is obtained. Then, the camera is calibrated using the obtained camera calibration matrix.
    Type: Application
    Filed: February 21, 2019
    Publication date: August 22, 2019
    Applicant: FICOSA ADAS, S.L.U.
    Inventors: David HAFNER, Taner GUNGO, Sebastian CARRENO