Patents by Inventor Leo Hoffmann

Leo Hoffmann 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).

  • Publication number: 20240132679
    Abstract: The invention relates to composite materials (organosheets) containing a thermoplastic molding compound, at least one continuous reinforcing fiber layer and at least one inorganic filler material. According to the invention, a sheet material consisting of continuous reinforcing fibers in a matrix composition comprising the molding compound is used, the thermoplastic molding compound containing at least one polyolefin, and optionally at least one further, polarity-functionalized polymer. The invention also relates to a process for produci2023ng the claimed composite material and to uses thereof.
    Type: Application
    Filed: December 14, 2021
    Publication date: April 25, 2024
    Inventors: Felix KLAUCK, Pierre JUAN, Norbert NIESSNER, Eike JAHNKE, Andre LUECK, Florian PIOTT, Dietmar DRUMMER, Leo HOFFMANN
  • Patent number: 10618207
    Abstract: The invention relates to a method for producing a material composite composed of metal and plastic to form a plastic-metal hybrid component, in which method, to improve the adhesion of the metal surface and at least one plastic component, stochastically random macroscopic and/or microscopic undercuts are made by means of short-pulse laser radiation in the metal surface in order to roughen it, these undercuts each being filled at least partially with the at least one plastic component in an injection moulding process such that said plastic component engages into the macroscopic and/or microscopic undercuts, wherein, following the roughening of the metal surface and before and/or during the injection moulding process for the at least one plastic component, at least the roughened surface of the metal is heated to a temperature which, during processing, lies in the range of room temperature up to 100° C. above the processing temperature of the plastic.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: April 14, 2020
    Assignees: BASF SE, Sabic Innovative Plastics B.V., TRUMPF Laser—und Systemtechnik GmbH
    Inventors: Kim Kose, Stephan Ohnimus, Michael Minkow, Harald Ott, Alexander Näck, Jan Gaugler, Holger Klink, Fred Eggers, Leo Hoffmann, Gerardus Doggen, Birgit Faisst
  • Publication number: 20170136668
    Abstract: The invention relates to a method for producing a material composite composed of metal and plastic to form a plastic-metal hybrid component, in which method, to improve the adhesion of the metal surface and at least one plastic component, stochastically random macroscopic and/or microscopic undercuts are made by means of short-pulse laser radiation in the metal surface in order to roughen it, these undercuts each being filled at least partially with the at least one plastic component in an injection moulding process such that said plastic component engages into the macroscopic and/or microscopic undercuts, wherein, following the roughening of the metal surface and before and/or during the injection moulding process for the at least one plastic component, at least the roughened surface of the metal is heated to a temperature which, during processing, lies in the range of room temperature up to 100° C. above the processing temperature of the plastic.
    Type: Application
    Filed: May 4, 2015
    Publication date: May 18, 2017
    Inventors: Kim Kose, Stephan Ohnimus, Michael Minkow, Harald Ott, Alexander Näck, Jan Gaugler, Holger Klink, Fred Eggers, Leo Hoffmann, Gerardus Doggen, Birgit Faisst
  • Patent number: 8007916
    Abstract: A composite part is produced by a process in which at least one of components a) and b) of said composite part is treated with an Openair plasma on a contact surface between said components a) and b) prior to production of the composite part, followed by molding-on of the other component; wherein said components are as follows: a) a part which entirely or to some extent comprises a molding composition comprising at least 40% by weight of a polyamide whose monomer units contain an average of at least 8 carbon atoms, and b) a part comprising another molding composition.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: August 30, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Karl Kuhmann, Klaus Hülsmann, Martin Wielpütz, Walter-Konrad Mertens, Ursula Schaub, Kirsten Alting, Simon Amesöder, Leo Hoffmann
  • Patent number: 7842392
    Abstract: Articles comprising polystyrene and thermoplastic polyurethane joined adheringly without chemical adhesion promoter.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: November 30, 2010
    Assignee: BASF SE
    Inventors: Klaus Hilmer, Leo Hoffmann
  • Publication number: 20090042007
    Abstract: Articles comprising polypropylene and thermoplastic polyurethane joined adheringly without chemical adhesion promoter.
    Type: Application
    Filed: February 21, 2006
    Publication date: February 12, 2009
    Applicant: BASF Aktiengesellschaft
    Inventors: Klaus Hilmer, Leo Hoffmann, Simon Amesoeder
  • Publication number: 20080258352
    Abstract: Articles comprising polystyrene and thermoplastic polyurethane joined adheringly without chemical adhesion promoter.
    Type: Application
    Filed: February 21, 2006
    Publication date: October 23, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Klaus Hilmer, Leo Hoffmann
  • Publication number: 20060292387
    Abstract: A composite part is produced by a process in which at least one of components a) and b) of said composite part is treated with an Openair plasma on a contact surface between said components a) and b) prior to production of the composite part, followed by molding-on of the other component; wherein said components are as follows: a) a part which entirely or to some extent comprises a molding composition comprising at least 40% by weight of a polyamide whose monomer units contain an average of at least 8 carbon atoms, and b) a part comprising another molding composition.
    Type: Application
    Filed: January 30, 2006
    Publication date: December 28, 2006
    Applicant: Degussa AG
    Inventors: Karl Kuhmann, Klaus Hulsmann, Martin Wielputz, Walter-Konrad Mertens, Ursula Schaub, Kirsten Alting, Simon Amesoder, Leo Hoffmann