Patents by Inventor Wolfgang Wehnert

Wolfgang Wehnert 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).

  • BLADE GRANULATOR AND METHOD FOR THE PRODUCTION OF CUT BODIES
    Publication number: 20090050719
    Abstract: A granulating mill for the production of cut pieces from viscous materials and a process for producing cut pieces are described. The granulating mill comprises gaps between the knives (1, 2) which are at least partially covered with a spray guard (4) which is fixed to the rotor (5).
    Type: Application
    Filed: October 30, 2008
    Publication date: February 26, 2009
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Siegfried Lippert, Tim Bielfeldt, Klaus Milling, Bodo Weickert, Wolfgang Wehnert
  • Blade granulator and method for the production of cut bodies
    Publication number: 20060054726
    Abstract: A granulating mill for the production of cut pieces from viscous materials and a process for producing such cut pieces are described. The mill comprises gaps between the knives (1, 2) which are at least partially covered with a spray guard (4) which is fixed to the rotor (5).
    Type: Application
    Filed: September 12, 2002
    Publication date: March 16, 2006
    Inventors: Siegfried Lippert, Tim Bielfeldt, Klaus Milling, Bodo Weickert, Wolfgang Wehnert
  • Polyphenylene sulphide moulding compounds with improved electrical properties
    Patent number: 5234984
    Abstract: This invention relates to crystalline, thermoplastic moulding compounds of polyphenylene sulphide (PPS) and aliphatically saturated carboxylic acid esters. The moulding compounds have increased tracking resistance.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: August 10, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Kohler, Wolfgang Wehnert, Klaus Kraft, Erhard Tresper
  • Mixture of polyarylene sulphides, glass fibres and maleimides
    Patent number: 5137938
    Abstract: The invention relates to mixtures of polyarylene sulphides, maleimides, glass fibres and if appropriate other additives. The mixtures are distinguished by good mechanical properties.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: August 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Kohler, Wilfried Cramer, Hans-Joachim Traenckner, Harald Pielartzik, Wolfgang Wehnert, William C. Bushong, Wolfgang Jakob
  • Blends of polyarylene sulfides, epoxides, anhydrides, glass fibers and optionally other fillers
    Patent number: 5124382
    Abstract: The invention relates to blends of polyarylene sulfides, epoxides, anhydrides, glass fibers and optionally other fillers. The blends are distinguished by good mechanical properties.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: June 23, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Kohler, Wolfgang Wehnert, Walter Uerdingen, Joachim Franke
  • Process for the metallization of moldings of polyarylene sulfides
    Patent number: 5108823
    Abstract: Circuit boards having excellent electrical and mechanical properties are obtained when special mixtures of polyarylene sulfides and polycarbonates, polyaryl ethers, polyamides, polyesters or rubber elastomers are used as base plates for the wet-chemical deposition of the circuits and the boards are treated with an oxidizing agent before activation.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: April 28, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kirkor Sirinyan, Karl-Heinz Kohler, Klaus Reinking, Wolfgang Russeler, Wolfgang Wehnert
  • Mixtures of polyarylene sulphides, glass fibres and heterocyclic nitroaryloxy compounds
    Patent number: 5102929
    Abstract: The invention relates to mixtures of polyarylene sulphides, heterocyclic nitryoaryloxy compounds and optionally other additives. The mixtures are distinguished by good mechanical properties.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: April 7, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Kohler, Walter Uerdingen, Klaus Kraft, Hans-Detlef Heinz, Wolfgang Wehnert
  • Conductive polyarylenesulphide mixtures containing carbon
    Patent number: 5093035
    Abstract: The invention relates to conductive blends made from polyarylenesulphides, preferably polyphenylenesulphides (PPS) with graphite and conductive carbon black.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: March 3, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Jurgen Dziurla, Klaus Kraft, Klaus Reinking, Wolfgang Wehnert
  • Filled thermoplasts with low shrinkage anisotropy
    Patent number: 5066704
    Abstract: A composition useful in producing molded articles, fibers and sheet products is a mixture of from 20 to 80% by weight of polyarylene sulphides, from 10 to 60% by weight of glass fibers and from 60 to 10% by weight of mica.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: November 19, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Wehnert, Klaus Reinking, Peter Bier, Klaus Kraft, Erhard Tresper
  • Blends of polyarylene sulfides, epoxides, glass fibers, optionally anhydride-containing polymers and optionally other additives
    Patent number: 5064884
    Abstract: The invention relates to blends of polyarylene sulfides, epoxides, glass fibers, optionally anhydride-containing polymers and optionally other additives. They are distinguished by good mechanical properties.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: November 12, 1991
    Inventors: Burkhard Kohler, Walter Uerdingen, Wolfgang Wehnert, Manfred Schmidt, Walter Schafer, Klaus Reinking
  • Process for lowering the melt viscosity of aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters with super-critical gases
    Patent number: 4990595
    Abstract: By treating aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters in the molten state with super-critical gases or gas mixtures under pressure, the melt viscosity of these polymers is considerably lowered so that basic chemical operations which proceed only incompletely under the usual conditions can be carried out on these thermoplasts.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: February 5, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Traechkner, Karl-Dieter Lohr, Wolfgang Wehnert, Claus Wulff, Wolfgang Arlt, Hanns-Ingolf Paul
  • Elastomer-modified carbon-containing polyarylene sulfide blends
    Patent number: 4985175
    Abstract: The invention relates to conductive blends of polyarylene sulfides (PAS), preferably polyphenylene sulfide (PPS), with graft polymers, conductive carbon black and graphite.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: January 15, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Dziurla, Klaus Reinking, Wolfgang Wehnert, Erhard Tresper
  • Vinyl copolymers with grafted-on polycarbonate chains, their production and use
    Patent number: 4874816
    Abstract: The invention relates to a process for the production of vinyl copolymers with grafted-on polycarbonate chains, to the grafted vinyl copolymers obtainable by the process according to the invention, to their use as modifiers for mixtures of thermoplastic polycarbonates and thermoplastic polystyrenes, to such mixtures themselves and to the use of such mixtures as substrates for optical discs.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: October 17, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Dujardin, Wolfgang Ebert, Rolf-Volker Meyer, Klaus Berg, Ulrich Grigo, Wolfgang Wehnert
  • Thermoplastic mixtures of aromatic polycarbonates and polystyrenes and their use as substrates for optical data memories
    Patent number: 4777215
    Abstract: The present invention relates to thermoplastic mixtures of 90 to 20% by weight of an aromatic polycarbonate with an Mw of 15,000 to 25,000 and p-(iso-C.sub.8 -C.sub.9 -alkyl)-phenyl end groups and 10 to 80% by weight of a polystyrene with an Mw of 80,000 to 400,000, and to their use as substrates for optical data memories.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: October 11, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Wehnert, Ulrich Grigo, Helmut Schmid, Joachim Wagner