Patents by Inventor Hans-Jurgen Hofmann

Hans-Jurgen Hofmann 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).

  • Patent number: 10259974
    Abstract: The invention relates to a roof coating comprising a bitumen layer with embedded particles.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: April 16, 2019
    Assignee: AMBERGER KAOLINWERKE EDUARD KICK GMBH & CO. KG
    Inventors: Hans-Jürgen Hofmann, Christian Kohl
  • Publication number: 20170190934
    Abstract: The invention relates to a roof coating comprising a bitumen layer with embedded particles.
    Type: Application
    Filed: July 1, 2015
    Publication date: July 6, 2017
    Inventors: Hans-Jürgen Hofmann, Christian Kohl
  • Patent number: 7219780
    Abstract: A piston, which has a piston rod, is guided with freedom of axial movement in a cylindrical pressure tube. At one end of the pressure tube, the piston rod passes through an opening in an end wall, which closes off the end of the pressure tube. The pressure tube is surrounded by a heat-shrink sleeve, which, at the exit end of the piston rod, extends more-or-less radially inward and has a pass-through opening through which the piston rod extends. The ring-shaped end surface at the piston rod exit end of the pressure tube is enclosed by the heat-shrink sleeve.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: May 22, 2007
    Assignee: Stabilus GmbH
    Inventors: Peter Thurmann, Hans Ihrlich, Arnold Schilz, Hans Jürgen Hofmann, Ines Kistenbrügger, Michael Auer
  • Publication number: 20040144605
    Abstract: A piston, which has a piston rod, is guided with freedom of axial movement in a cylindrical pressure tube. At one end of the pressure tube, the piston rod passes through an opening in an end wall, which closes off the end of the pressure tube. The pressure tube is surrounded by a heat-shrink sleeve, which, at the exit end of the piston rod, extends more-or-less radially inward and has a pass-through opening through which the piston rod extends. The ring-shaped end surface at the piston rod exit end of the pressure tube is enclosed by the heat-shrink sleeve.
    Type: Application
    Filed: October 31, 2003
    Publication date: July 29, 2004
    Applicant: Stabilus GmbH
    Inventors: Peter Thurmann, Hans Ihrlich, Arnold Schilz, Hans Jurgen Hofmann, Ines Kistenbrugger, Michael Auer
  • Patent number: 4814272
    Abstract: Rhamnolipids with high surface activity are produced micro iologically in high yield per g of dry cell substance using Pseudomonas spec. DSM 2874 in the form of growing, resting and immobilized cell mass in an aqueous medium containing at least one assimilable carbon source at a pH of 6.7 to 7.3 and a temperature of 30.degree. to 37.degree. C. Two new rhamnolipids with only one .beta.-hydroxydecanoic acid residue in the molecule and defined as .alpha.-L-rhamnopyranosyl- and 2-O-.alpha.-L-rhamnopyranosyl-.alpha.-L-rhamnopyranosyl-.beta.-hydroxydeca noic acid with a molecular weight of 334 and 480, respectively, are obtained.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: March 21, 1989
    Assignee: Wintershall AG
    Inventors: Fritz Wagner, Christoph Syldatk, Uwe Matulowic, Hans-Jurgen Hofmann, Kai-Udo Sewe, Walter Lindorfer
  • Patent number: 4720456
    Abstract: Anionic, surface-active trehalose lipids, in which different organic acids are bound to a trehalose molecule by an ester linkage, are prepared by aerobically cultivating trehalose-producing microorganisms, capable of assimilating hydrocarbons, under growth-limiting conditions, but without limiting the oxygen.
    Type: Grant
    Filed: August 20, 1986
    Date of Patent: January 19, 1988
    Assignee: Wintershall AG
    Inventors: Fritz Wagner, Egbert Ristau, Zu-yi Li, Siegmund Lang, Walther Schulz, Hans-Jurgen Hofmann, Kai-Udo Sewe, Walter Lindorfer