Patents by Inventor Bernhard Lehmann
Bernhard Lehmann 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).
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Publication number: 20070037934Abstract: A process for preparing copolymers which comprises copolymerizing (A) at least one ethylenically unsaturated dicarboxylic anhydride derived from at least one dicarboxylic acid having 4 to 8 carbon atoms, (B) at least one vinylaromatic compound, and (C) optionally at least one non-(A) ethylenically unsaturated comonomer containing at least one heteroatom, (D) reacting the copolymer with at least one compound of the formula I a or I b where A1 is C2-C20 alkylene, identical or different, R1 is C1-C30 alkyl, linear or branched, and n is an integer from 1 to 200, hydrolyzing the product with water or an aqueous alkaline solution, and subsequent to hydrolysis adding further free-radical initiator.Type: ApplicationFiled: September 14, 2004Publication date: February 15, 2007Applicant: BASF AktiengesellschaftInventors: Matthias Kluglein, Bernhard Lehmann, Stephan Huffer, Friedrich Goffing, Tanja Schneider, Helmut Gumbel
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Patent number: 7077964Abstract: The present invention relates to a process for preparing novel, monodisperse ion exchangers having chelating functional groups, and their use for adsorbing metal compounds, in particular, heavy metal compounds and noble metal compounds, and also for extracting alkaline-earth metals from saline solutions from alkali metal chloride electrolysis.Type: GrantFiled: October 17, 2003Date of Patent: July 18, 2006Assignee: Bayer AktiengesellschaftInventors: Reinhold Klipper, Werner Strüver, Ulrich Schnegg, Bruno Hees, Bernhard Lehmann, Holger Lütjens
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Publication number: 20040082744Abstract: The present invention relates to a process for preparing novel, monodisperse ion exchangers having chelating functional groups, and their use for adsorbing metal compounds, in particular, heavy metal compounds and noble metal compounds, and also for extracting alkaline-earth metals from saline solutions from alkali metal chloride electrolysis.Type: ApplicationFiled: October 17, 2003Publication date: April 29, 2004Inventors: Reinhold Klipper, Werner Struver, Ulrich Schnegg, Bruno Hees, Bernhard Lehmann, Holger Lutjens
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Patent number: 6649663Abstract: The present invention relates to a process for preparing novel, monodisperse ion exchangers having chelating functional groups, and their use for adsorbing metal compounds, in particular, heavy metal compounds and noble metal compounds, and also for extracting alkaline-earth metals from saline solutions from alkali metal chloride electrolysis.Type: GrantFiled: August 21, 2000Date of Patent: November 18, 2003Assignee: Bayer AktiengesellschaftInventors: Reinhold Klipper, Werner Strüver, Ulrich Schnegg, Bruno Hees, Bernhard Lehmann, Holger Lütjens
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Publication number: 20020185443Abstract: The object of the present invention is a process for preparing novel heterodisperse chelating resins having chelating functional groups, and their use for adsorbing metal compounds, in particular alkaline earth metals, heavy metal compounds and precious metal compounds, and also for extracting alkaline earth metals from saline solutions derived from alkali metal chloride electrolysis, and also in hydrometallurgy.Type: ApplicationFiled: April 29, 2002Publication date: December 12, 2002Inventors: Reinhold Klipper, Rudiger Seidel, Bruno Hees, Dieter Irmscher, Bernhard Lehmann, Holger Lutjens, Ulrich Schnegg, Wolfgang Zarges
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Patent number: 6468359Abstract: The invention relates to a method for cleaning a metallic or an enameled surface comprising flooding a metallic surface contaminated with deposits with a mixture comprising (i) water, (ii) chippings of woods selected from the group consisting of merantis, bongossis, mahoganies, sipos, khayas, lauans, and sapellis, and (iii) a member selected from the group consisting of polyaspartic acid, salts of polyaspartic acid, and polysuccinimide, and thereby cleaning the surface.Type: GrantFiled: March 16, 2001Date of Patent: October 22, 2002Assignee: Bayer AktiengesellschaftInventors: Manfred Gerlach, Bernhard Lehmann
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Patent number: 6387189Abstract: A method of cleaning surfaces made of glass, graphite, ceramics, polymeric and metallic materials, synthetic and vegetable fibres, e.g. fabrics, textiles or waste paper, in particular membrane surfaces, by detaching or dissolving organic and inorganic soilings by a simple flushing operation, where a solution of an iminocarboxylic acid, a polyamino acid, an emulsifier or a mixture thereof is used.Type: GrantFiled: March 30, 1999Date of Patent: May 14, 2002Assignee: Bayer AktiengesellschaftInventors: Andreas Gröschl, Torsten Groth, Volker Hassmann, Jürgen Horn, Ingo Janisch, Winfried Joentgen, Bernhard Lehmann, Wolfgang Zarges
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Publication number: 20020035216Abstract: The present invention relates to a process for preparing novel, monodisperse crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds, in particular heavy metal compounds or noble metal compounds.Type: ApplicationFiled: October 15, 2001Publication date: March 21, 2002Inventors: Reinhold Klipper, Werner Struver, Ulrich Schnegg, Heiko Hoffmann, Dieter Mauer, Bernhard Lehmann, Bruno Hees, Holger Lutjens
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Patent number: 6329435Abstract: The present invention relates to a process for preparing novel, monodisperse crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds, in particular heavy metal compounds or noble metal compounds.Type: GrantFiled: August 21, 2000Date of Patent: December 11, 2001Assignee: Bayer AktiengesellschaftInventors: Reinhold Klipper, Werner Strüver, Ulrich Schnegg, Heiko Hoffmann, Dieter Mauer, Bernhard Lehmann, Bruno Hees, Holger Lütjens
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Publication number: 20010010230Abstract: A method for cleaning surfaces with a mixture containing water and wood chippings, a specific mixture, and the use of said mixture as a cleaner.Type: ApplicationFiled: March 16, 2001Publication date: August 2, 2001Inventors: Manfred Gerlach, Bernhard Lehmann
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Patent number: 6245157Abstract: The present invention relates to cleaning compositions which, as powder or as aqueous formulation, comprise sodium bicarbonate and, as dispersants, polyaspartic acids and/or salts thereof, to the use of these cleaning compositions for the abrasive cleaning of hard surfaces, and also to a method of cleaning surfaces contaminated with deposits using these cleaning compositions.Type: GrantFiled: September 14, 1999Date of Patent: June 12, 2001Assignee: Bayer AktiengesellschaftInventors: Manfred Gerlach, Bernhard Lehmann, Hartwig Wendt, Herbert Emde, Urban Recht
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Patent number: 6231680Abstract: A method for cleaning a surface by flooding and thereby cleaning a surface contaminated with deposits with a mixture containing water, wood chippings, and optionally, polyaspartic acid or a derivative of a polyaspartic acid.Type: GrantFiled: February 16, 2000Date of Patent: May 15, 2001Assignee: Bayer AktiengesellschaftInventors: Manfred Gerlach, Bernhard Lehmann
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Patent number: 6161286Abstract: In a process for manufacturing a vehicle body shell, the linking of an integral support to a forward structure of a known vehicle body shell may lead to tolerances which require readjustments of the axle geometry of the front axle. Accordingly, the bearing points of each wheel installation unit for the upper transverse control arm bearing which are situated behind one another in the longitudinal direction of the vehicle are brought to a defined distance range by a tensioning of the wheel installation unit, and a center fixation of the forward structure takes place relative to the longitudinal direction of the vehicle.Type: GrantFiled: June 24, 1998Date of Patent: December 19, 2000Assignee: DaimlerChrysler AGInventors: Bernhard Lehmann, Michael Riestenpatt genannt Richter
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Patent number: 6100319Abstract: The plasticity of ceramic compositions and dispersions can be improved by addition of at least one polymer (I) with recurring succinyl units. This effect can be reversed by addition of a setting accelerator (II); preferred setting accelerators are polymers (II) of the polyalkylenepolyamine type.Type: GrantFiled: September 11, 1998Date of Patent: August 8, 2000Assignee: Bayer AktiengesellschaftInventors: Torsten Groth, Winfried Joentgen, Bernhard Lehmann, Ralf Moritz, Ulrich Litzinger, Rudiger Schubart, Thomas Menzel
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Patent number: 5931485Abstract: In a support arrangement for a steered vehicle wheel mounted on a wheel carrier which is supported by a transverse link by way of a ball joint with a flange pivotally supported and mounted on the transverse link by clamping screws extending through spaced mounting holes in the transverse link and the mounting flange, the mounting holes in one of the transverse link and mounting flange is formed by at least three different receiving bores disposed at different distances from the pivot point of the flange for receiving the clamping screws and the mounting holes in the other are holes elongated along a line extending through the pivot point between the transverse link and the flange and forming jointly with the screws stops which provide for positive engagement between the transverse link and the flange in each of the different relative pivot positions between the two.Type: GrantFiled: July 24, 1997Date of Patent: August 3, 1999Assignee: Daimler Benz AGInventors: Wolfgang Modinger, Thomas Schneider, Bernhard Lehmann
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Patent number: 5707531Abstract: Oil emulsions are broken in a particularly advantageous manner by adding to them a breaker which comprises poly-DADMAC and polyalkylenepolyamines.Type: GrantFiled: August 5, 1996Date of Patent: January 13, 1998Assignee: Bayer AktiengesellschaftInventors: Bernhard Lehmann, Ulrich Litzinger
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Patent number: 5372723Abstract: Oil-in-water emulsions are reprocessed in a particularly effective manner by a process in whicha) an oil-in-water emulsion is first subjected with the aid of a chemical emulsion breaker to a first breaking andb) the resulting water phase is fed to a micro-, nano- and/or ultrafiltration or a reverse osmosis,which is characterised in thatc) the oil phase from stage a) is combined with the oil phase from stage b) andd) the oil phases thus combined are subjected with the aid of organic emulsion breakers to a second breaking.Type: GrantFiled: June 23, 1993Date of Patent: December 13, 1994Assignee: Bayer AktiengesellschaftInventors: Johannes de Geus, Rolf Kehlenbach, Bernhard Lehmann
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Patent number: 5314982Abstract: The invention relates to a new three-part process, which can also be employed on a large industrial scale, for the preparation of polyurea lubricating greases, which is characterised(a) in that polyureas which carry oleophilic groups are prepared by reaction of diisocyanates with amines either in the absence of a solvent on a reaction screw at 80.degree.-120.degree. C., preferably at 85.degree.-95.degree. C., (variant A) or in a toluene medium at 20.degree.-80.degree. C., preferably at 30.degree.-60.degree. C., (variant B),(b) in that, after complete reaction, the polyureas prepared according to (a) are ground in the solid, dry state to give powders (at least 70% by weight of the powder having particle sizes of about 100-400.mu.) and(c) in that the ground crude product, after being made into a "paste" (wetted) at elevated temperature in the base oil employed (10-30 minutes at 140.degree.-180.degree. C.Type: GrantFiled: September 17, 1992Date of Patent: May 24, 1994Assignee: Bayer AGInventors: Christian Rasp, Ralf Timmermann, Hermann Perrey, Bernhard Lehmann, Siegfried Kussi
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Patent number: 5176041Abstract: A control transmitter, especially for hydraulic valves comprises a housing, a switching rod which is arranged in the housing deflectably in at least two main axes, a ball pivot turnably supporting the switching rod in the housing, two control brackets arranged perpendicularly to one another and turnably supported in the housing so that the switching rod is in operative connection with the control brackets, a rotary angle transmitter arranged on a bearing point of each of the control brackets, a spring-loaded sliding body arranged on the switching rod and having an outer edge which slides over a conically curved contour of the housing having different raising portions.Type: GrantFiled: May 13, 1991Date of Patent: January 5, 1993Assignee: Robert Bosch GmbHInventors: Dietmar Meier, Bernhard Lehmann
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Patent number: 5119303Abstract: Brake-force control system (ABS) for vehicles, in particular motor vehicles, with separate control of the front wheel brakes and with joint or separate rear wheel brakes which can be switched over to "select high" control or individual control and/or with a limited-slip differential at the rear axle, the switchover of the rear wheel brakes and/or of the limited-slip differential being effected at different coefficients of friction (.mu.-split) with a specifiable rate of rise dependent on the travelling speed, and in which, in order to increase directional stability during a braking procedure, a switching device is provided which blocks a switchover of the rear wheel brakes and/or of the limited-slip differential until the travelling speed from the time of the detection of different coefficients of friction has decreased to a specified value, the rate of rise of the switchover being dependent at least one the duration of the reduction of the vehicle speed to the specified value.Type: GrantFiled: December 22, 1989Date of Patent: June 2, 1992Assignee: Daimler-Benz AGInventors: Helmut Struck, Gerhard Fischle, Bernhard Lehmann