Patents by Inventor Hartmut Lower

Hartmut Lower 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).

  • Polycarbonate moulding compounds and their use as layers in coextruded sheets
    Patent number: 6359042
    Abstract: A polycarbonate molding composition containing a UV absorber and two types of mold release agents is disclosed. The composition is suitable for use as coating or external layer on coextruded sheets.
    Type: Grant
    Filed: January 15, 2000
    Date of Patent: March 19, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Siegfried Anders, Hartmut Löwer, Wolfgang Nising, Wilfried Haese
  • Process for the production of multilayer plastic sheets
    Patent number: 5856012
    Abstract: The invention relates to a process for the production of multilayer plastic sheets from special branched polycarbonates.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: January 5, 1999
    Assignee: Bayer AG
    Inventors: Steffen Kuhling, Hartmut Lower, Siegfried Anders, Jurgen Kirsch, Werner Verhoeven
  • Stabilizer mixtures and their use in polycarbonates
    Patent number: 5852138
    Abstract: The invention provides stabilizer mixtures comprising phosphines, silicon compound and optionally silicon-free oxetane compounds and/or silicon-free epoxide compounds and their use for stabilizing thermoplastic aromatic polycarbonates.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: December 22, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut-Martin Meier, Hartmut Lower, Wolfgang Ebert, Wilfried Haese
  • UV-protected, multilayer polycarbonate sheets
    Patent number: 5846659
    Abstract: The present invention relates to UV-protected, multilayer polycarbonate sheets containing a base sheet, at least one outer layer and optionally at least one additional protective layer, and to the production of the polycarbonate sheets according to the invention by coextrusion.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: December 8, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hartmut Lower, Siegfried Anders, Helmut Schmid, Wolfgang Nising
  • Use of carbonates as demoulding agents for thermoplastic polycarbonates
    Patent number: 5726228
    Abstract: The present invention relates to the use of cyclic carbonates as demoulding agents for thermoplastic polycarbonates, and to the incorporation of these cyclic carbonates into the thermoplastic polycarbonates.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: March 10, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kaufmann, Wolfgang Ebert, Hartmut Lower, Jurgen Kadelka, Claus Wulff, Gottfried Zaby
  • Polydiorganosiloxane/polycarbonate block copolymers
    Patent number: 4732949
    Abstract: The present invention relates to the preparation of thermoplastic poly-(diorganosiloxane)/polycarbonate block copolymers containing monoalkylphenyl or dialkylphenyl end groups by the phase boundary process, and to the block copolymers which can be obtained by the process.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: March 22, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Paul, Werner Nouvertne, Hartmut Lower, Mark W. Witman, Ulrich Grigo
  • UV-stabilized polycarbonate mouldings
    Patent number: 4600632
    Abstract: The present invention relates to thin-walled UV-stabilized polycarbonate mouldings, especially webbed laminate panels and films, made of polydiorganosiloxane/polycarbonate block copolymers.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: July 15, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Paul, Hartmut Lower, Peter R. Muller, Mark W. Witman, Siegfried Storp
  • Benzylidenemalonic or vinylogous benzylidenemalonic acid polyesters, their preparation and their use for the UV stabilization of thermoplastics
    Patent number: 4588807
    Abstract: The present invention relates to new benzylidenemalonic or vinylogous benzylidenemalonic acid polyesters containing structural units of the formula (I) ##STR1## their preparation and their use for the UV stabilization of thermoplastics, preferably thermoplastic, aromatic polycarbonates, thermoplastic, aromatic polyesters or thermoplastic polymethylmethacrylates.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: May 13, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Scholl, Reinhard Preuss, Burkhard Lachmann, Hartmut Lower, Peter R. Muller
  • Circuit arrangement for identification and addressing
    Patent number: 4110555
    Abstract: To connect one out of a plurality of peripheral units to a data bus, each unit is connected to two wires of an address matrix. When a unit wants to connect itself to the data bus, it applies a starting voltage to both wires. The central unit then searches in both matrix coordinates for the two wires of the starting-voltage-transmitting unit and connects the unit so found to the data bus by excitation via the wires.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: August 29, 1978
    Assignee: International Standard Electric Corporation
    Inventors: Bernhard Heine, Wolfgang Arndt, Hartmut Lower