Patents by Inventor Gunther Lehnert

Gunther Lehnert 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: 5219202
    Abstract: In vehicle seat frames the overload protection during the deformation of the brackets (4; 5) of the fittings (3) as a result of impact stresses includes a particular force path in that a fixed point connection (20) and a sliding connection (21) are formed by connecting bolts (9; 10, 22; 26) between at least one bracket (4; 5) of each fitting (3) and the lower seat part (1) or backrest (2).
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: June 15, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Rink, Gunther Lehnert
  • Patent number: 4652493
    Abstract: The disclosed invention is concerned with porous substrates impregnated with moisture curing polyurethane oligomers incorporating tertiary nitrogen atoms and free aromatic isocyanate groups in which the yellowing tendency of these isocyanates is diminished or supressed by the inclusion of specific light protection agents. These agents are either substituted oxalanilides or indole or indoline derivatives. The impregnated substrates cure rapidly when exposed to moisture to yield rigid structures suitable as a replacement for Plaster of Pairs in medicinal and veterinary bandaging applications.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: March 24, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Reichmann, Gunther Lehnert
  • Patent number: 4376438
    Abstract: The present invention relates to a process for producing a supporting bandage for surgical or veterinary surgical use comprising covering the part of the body which is required to be supported with an air-permeable dressing and then applying a self-hardening bandage over this dressing, characterized in that the self-hardening bandage comprise strips of air-permeable, flexible fabric coated and/or impregnated with about 50 to 300% by weight, based on the uncoated fabric, of an isocyanate prepolymer which contains free isocyanate groups and is based on aromatic polyisocyanates and polyols containing tertiary amino nitrogen atoms, the prepolymer having an isocyanate content of about 5 to 30% by weight and a tertiary amino nitrogen content of about 0.05 to 2.5% by weight, the coated fabric being soaked with water immediately before it is applied.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: March 15, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz A. Straube, Gunther Lehnert
  • Patent number: 4333809
    Abstract: The present invention is directed to cross-linkable, thermoplastically processable, segmented, high molecular weight polycarbonate elastomers, to the process for their preparation and to their use in their cross-linked form.
    Type: Grant
    Filed: July 22, 1980
    Date of Patent: June 8, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schreckenberg, Dieter Freitag, Hans-Heribert Burgdorfer, Gunther Lehnert, Siegfried Adelmann, Hans Rudolph
  • Patent number: 4281101
    Abstract: The subject of instant invention is a process for the preparation of aliphatic-aromatic polycarbonates with diphenol carbonate end groups, the polycarbonates obtained therefrom and their use for the preparation of high-molecular, segmented, aliphatic-aromatic polycarbonate elastomers which can be processed as thermoplastics.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: July 28, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schreckenberg, Klaus Konig, Dieter Freitag, Gunther Lehnert, Christian Lindner
  • Patent number: 4268155
    Abstract: A photographic apparatus for plate thermography comprising a support having a holder for a thermographic plate at one end and a photographic camera with flashlight at the opposite end. An adaptor designed to be mounted on the support and locked to it is provided for the attachment of different camera systems. Bus bars or contact rails are provided both on the support and in the adaptor so that when the adaptor is placed in position, electrical contact is established between the flashlight and a source of current on the support.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: May 19, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunther Lehnert, Rainer Schiffer
  • Patent number: 4046710
    Abstract: A process for the preparation of a catalyst for the polymerization and copolymerization of cyclic olefins which have 4, 5, 7 or more ring carbon atoms and at least one olefinic double bond in the ring, fromA. at least one halide or oxyhalide of molybdenum, preferably with molybdenum in the oxidation state +5,B. at least one 2-halo alcohol andC. at least one aluminium compound in the molar ratio of a : b = 1 : 1 to 1 : 10 and a : c = 1 : 0.5 to 1 : 30,Characterized in that the molybdenum halide or oxyhalide and the 2-halo alcohol are reacted with the exclusion of solvents or in the presence of chlorinated solvents which are inert towards the molybdenum salt and in which the molybdenum salt is soluble to an extent of at least 0.01 molar, and the aluminium alkyl compound is added, optionally in the presence of the monomers.
    Type: Grant
    Filed: January 27, 1976
    Date of Patent: September 6, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunther Lehnert, Dieter Maertens, Gottfried Pampus, Josef Witte
  • Patent number: 4020257
    Abstract: Catalysts obtained fromA. a reaction product of 1 mol tungsten hexachloride with from 1 to 4 mols of a mixture of 2-chloroethanol and 2,2,2-trichloroethanol in a molar ratio of from 1 : 3 to 3 : 1; andB. from 1 to 20 mol, per mol of tungsten in component (A), of an organometallic aluminium for disproportionation and metathesis of olefin and for ring opening polymerization of cyclic olefins.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: April 26, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Witte, Gunther Lehnert
  • Patent number: 3966637
    Abstract: Catalysts obtained fromA. a reaction product of 1 mol tungsten hexachloride with from 1 to 4 mols of a mixture of 2-chloroethanol and 2,2,2-trichloroethanol in a molar ratio of from 1 : 3 to 3 : 1; andB. from 1 to 20 mol, per mol of tungsten in component (A), of an organometallic aluminium for disproportionation and metathesis of olefin and for ring opening polymerizaton of cyclic olefins.
    Type: Grant
    Filed: November 12, 1974
    Date of Patent: June 29, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Witte, Gunther Lehnert
  • Patent number: 3935178
    Abstract: A process for the polymerisation of cyclooctadiene-(1,5) wherein cyclooctadiene-(1,5) is polymerised on halides of tungsten, molybdenum, tantalum, or rhenium as catalyst in the presence of bicyclo-[2,2,1]-heptadienes-(1,5) of the general formula (I) ##SPC1##as activator, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 denoting independently of each other, a monovalent hydrocarbon radical or hydrogen.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: January 27, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunther Lehnert, Dieter Maertens, Manfred Zimmermann
  • Patent number: 3933778
    Abstract: Ring opening polymerisation of cyclooctadiene-(1,5) (COD) optionally in an inert organic solvent on a catalyst ofA. a tungsten salt,B. a halogenated alcohol in which the halogen and OH group are attached to adjacent carbon atoms, and/or an epoxide and/or a halogenated phenol, andC. an organo aluminium compound and/or an aluminium halide.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: January 20, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gottfried Pampus, Gunther Lehnert, Josef Witte