Patents by Inventor Manfred Ohlinger
Manfred Ohlinger 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: 20010026880Abstract: Tape-like magnetic recording media having a nonmagnetic substrate and at least one layer applied to the substrate having incorporated into at least one of these layers, an inorganic needle-shaped pigment which serves as a supporting pigment and has a ratio of the average length to the average diameter of the pigment of at least 3, and the mean modulus of elasticity of the layers is not less than 15 Gpa in the longitudinal direction of the tape-like recording media.Type: ApplicationFiled: March 19, 2001Publication date: October 4, 2001Inventors: August Lehner, Helmut Jakusch, Volker Koch, Manfred Ohlinger, Albert Kohl, Werner Lenz, Norbert Schneider, Peter Heilmann, Werner Hubner, Erich Hoffmann, Ronald John Veitch, Rudi Lehnert, Harald Jachow
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Patent number: 6231963Abstract: Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).Type: GrantFiled: March 17, 1998Date of Patent: May 15, 2001Assignee: EMTEC Magnetics GmbHInventors: August Lehner, Helmut Jakusch, Volker Koch, Manfred Ohlinger, Albert Kohl, Werner Lenz, Norbert Schneider, Peter Heilmann, Werner Hübner, Erich Hoffmann, Ronald John Veitch, Rudi Lehnert, Harald Jachow
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Patent number: 5569409Abstract: A finely divided acicular CrO.sub.2 modified with iron, tellurium and/or antimony and having a high coercive force possesses improved heat stability of the residual induction and a relatively narrow distribution of the particle size and of the coercive force. This CrO.sub.2 pigment is obtained by a method in which the iron compound used for the modification is iron oxalate, which is employed in an amount of 1-10% by weight, based on the theoretical CrO.sub.2 yield.Type: GrantFiled: November 16, 1994Date of Patent: October 29, 1996Assignee: BASF Magnetics GmbHInventors: Harald Jachow, Reinhard K orner, Ronald J. Veitch, Ekkehard Schwab, Helmut Jakusch, Bernd H oppner, Rudi Lehnert, Manfred Ohlinger
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Patent number: 5496633Abstract: A transfer film having a magnetic layer consists essentially of a substrate film, a parting layer and a transfer layer which is detachable from the said parting layer and is formed by one or more magnetic layers, and, on that side of the magnetic layer which faces the substrate film, after detachment of the substrate film, the surface-forming layer consists of a top layer which contains inorganic pigments in a cross-linked polymer matrix and has a thickness of from 0.2 to 5.0 .mu.m and a surface resistance of from 10.sup.-1 to 10.sup.-8 ohm/cm.Type: GrantFiled: July 25, 1991Date of Patent: March 5, 1996Assignee: BASF AktiengesellschaftInventors: Manfred Steuerwald, Manfred Ohlinger, Jenoe Kovacs, Dieter Schwarz
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Patent number: 5378383Abstract: A magnetic recording medium comprising a nonmagnetic substrate and at least one magnetic layer applied thereon and containing an acicular chromium dioxide uniformly distributed in a polymeric binder and additives and having a coercive force of at least 60 kA/m, a mean particle length of the chromium dioxide of less than 300 nm, whose factor HD according to the formula ##EQU1## where KT is the coercive force of the magnetic layer in [kA/m], measured in an external field of 380 kA/m, L is the mean particle length and .DELTA.L is the range of the particle size distribution, determined from the numerical distribution of the particle length, both measured in [nm], is greater than 1.85, and a process for the preparation of this chromium dioxide.Type: GrantFiled: August 20, 1993Date of Patent: January 3, 1995Assignee: BASF Magnetics GmbHInventors: Harald Jachow, Ekkehard Schwab, Reinhard Koerner, Norbert Mueller, Rudi Lehnert, Manfred Ohlinger, Helmut Auweter, Helmut Jakusch, Ronald J. Veitch, Michael Bobrich
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Patent number: 5264292Abstract: Transfer films consist essentially of a support film, a release layer and a transfer layer detachable from this release layer and composed of two magnetic layers and said transfer films may have, on the second magnetic layer, an adhesive layer which serves for fixing the transfer layer to a substrate, the two magnetic layers each containing a magnetizable material having a different coercive force.Type: GrantFiled: September 4, 1991Date of Patent: November 23, 1993Assignee: BASF Magnetics GmbHInventors: Jenoe Kovacs, Manfred Ohlinger, Manfred Steuerwald
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Patent number: 5209970Abstract: Abstract of the Disclosure: Magnetic recording media comprise a nonmagnetic substrate and a magnetizable layer arranged thereon and essentially consisting of a magnetic material from the group consisting of the cobalt-modified iron oxides and of the hexagonal ferrites and inorganic fillers finely dispersed in organic binders, the inorganic filler used being ferromagnetic chromium dioxide.Type: GrantFiled: August 13, 1990Date of Patent: May 11, 1993Assignee: BASF AktiengesellschaftInventors: Manfred Ohlinger, Jenoe Kovacs
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Patent number: 5164173Abstract: Stabilized acicular ferromagnetic chromium dioxide is prepared by a method in which the chromium dioxide surface formed as a result of a reductive treatment is treated with adsorbed monobasic or polybasic hydroxycarboxylic acids.Type: GrantFiled: May 27, 1988Date of Patent: November 17, 1992Assignee: BASF AktiengesellschaftInventors: Norbert Muller, Manfred Ohlinger, Rainer Feser, Bernhard Bottcher, Peter Rudolf, Werner Hubner
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Patent number: 5096779Abstract: A chromium dioxide material consisting of acicular, ferromagnetic chromium dioxide particles having a nonmagnetic, hydrogen-containing protective surface layer, which material has improved stability to chemical decomposition, a process for its preparation and magnetic recording media containing this chromium dioxide and having good long-term stability of the residual magnetization under conditions of high humidity and temperature are described.Type: GrantFiled: August 23, 1989Date of Patent: March 17, 1992Assignee: BASF AktiengesellschaftInventors: Michael W. Mueller, Ekkehard Schwab, Helmut Auweter, Rainer Feser, Werner Huebner, Norbert Mueller, Manfred Ohlinger, Hermann Dikow
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Patent number: 5030371Abstract: An acicular, ferromagnetic material which has a high coercive force and essentially consists of iron-containing chromium dioxide is prepared by thermal decomposition of hydrated chromium(III) chromate under superatmospheric pressure.Type: GrantFiled: October 31, 1989Date of Patent: July 9, 1991Assignee: BASFInventors: Michael W. Mueller, Ekkehard Schwab, Helmut Auweter, Rainer Feser, Rudi Lehnert, Norbert Mueller, Manfred Ohlinger
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Patent number: 4741895Abstract: A process for the preparation of chromium(III) oxide by decomposing hydrated ammonium dichromate at elevated temperatures, an apparatus for carrying out this process and the use of the chromium(III) oxide thus prepared as a starting material for the synthesis of chromium dioxide.Type: GrantFiled: October 17, 1986Date of Patent: May 3, 1988Assignee: BASF AktiengsellschaftInventors: Norbert Mueller, Bernhard Boettcher, Manfred Ohlinger, Helmut Reinicke, Gerhard Honecker
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Patent number: 4670177Abstract: Ferromagnetic chromium dioxide is prepared by converting oxides of trivalent and hexavalent chromium under superatmospheric pressure and at elevated temperatures in the presence of water and with the addition of an antimony compound as a modifier and, if required, further additives in an amount of not more than 15% by weight, by a method in which the antimony compound is present in the form of a water-soluble salt whose anion contains one or more organic molecular moieties which are oxidized in concentrated chromic acid.Type: GrantFiled: August 7, 1985Date of Patent: June 2, 1987Assignee: BASF AktiengesellschaftInventors: Manfred Ohlinger, Norbert Mueller, Peter Rudolf, Eugen Wettstein
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Patent number: 4619777Abstract: A magnetic dispersion which can be applied to a non-magnetic base to produce a recording medium is prepared by dispersing a magnetically anisotropic material in a polymer binder and in an organic solvent by a method wherein the magnetically anisotropic material is worked in a jet mill before and/or during dispersing.Type: GrantFiled: May 5, 1983Date of Patent: October 28, 1986Assignee: BASF AktiengesellschaftInventors: Milena Melzer, Helmut Jakusch, Werner Grau, Eberhard Koster, Werner Loser, Reinhard Polke, Gunter Schadel, Manfred Ohlinger, Gunter Vath
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Patent number: 4521527Abstract: Molded iron catalysts which contain metallic iron particles, obtained from anisometric iron oxide particles by contact with hydrogen at .ltoreq.500.degree. C., and a lubricant, are prepared.Type: GrantFiled: August 18, 1983Date of Patent: June 4, 1985Assignee: BASF AktiengesellschaftInventors: Gerhard Frank, Peter Rudolf, Gerald Neubauer, Manfred Ohlinger, Hans J. Wilfinger, Emil Pfannebecker, Paul Duffner
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Patent number: 4497723Abstract: A process for the preparation of acicular ferrimagnetic iron oxides by reducing gamma-iron(III) oxide hydroxide to magnetite, at from 280.degree. to 620.degree. C., by means of an organic compound which is decomposable at this temperature in the presence of iron oxide, and, optionally, a stream of reducing gas, and, if desired, then oxidizing the magnetite with oxygen-containing gases, at from 150.degree. to 450.degree. C., to acicular ferrimagnetic iron oxide of the formula FeO.sub.x, where x is from above 1.33 to 1.50, wherein the organic compound used for the reduction is a non-polar glycerol ester of a fatty acid which is introduced into the aqueous reaction suspension during the preparation of the gamma-iron(III) oxide hydroxide.Type: GrantFiled: June 27, 1983Date of Patent: February 5, 1985Assignee: BASF AktiengesellschaftInventors: Manfred Ohlinger, Guenter Vaeth, Peter Rudolf, Wilhelm Sarnecki, Helmut Jakusch, Eberhard Koester, Milena Melzer
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Patent number: 4492804Abstract: Saturated primary amines are prepared by reacting a nitrile with hydrogen at elevated temperature under superatmospheric pressure in the presence of ammonia and a metallic iron catalyst which has been obtained by reducing anisometric iron oxide particles with hydrogen at not more than 500.degree. C.Type: GrantFiled: August 18, 1983Date of Patent: January 8, 1985Assignee: BASF AktiengesellschaftInventors: Gerhard Frank, Peter Rudolf, Gerald Neubauer, Paul Duffner, Manfred Ohlinger, Hans J. Wilfinger, Emil Pfannebecker
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Patent number: 4457982Abstract: A modified acicular ferrimagnetic iron oxide which consists of a core of gamma-iron(III) oxide and a surrounding shell of gamma-iron(III) oxide modified by tin dioxide and carbon, and a process for its preparation.Type: GrantFiled: January 28, 1983Date of Patent: July 3, 1984Assignee: BASF AktiengesellschaftInventors: Peter Rudolf, Jenoe Kovacs, Guenter Vaeth, Manfred Ohlinger
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Patent number: 4378240Abstract: A process for the preparation of acicular ferromagnetic metal particles, consisting essentially of iron, by reducing acicular iron oxides and/or iron oxide hydroxides, which are either pure or are modified with conventional foreign metal ions, by means of a gaseous reducing agent in a fluidized bed furnace in which a stirrer is provided immediately above the fluidizing grid.Type: GrantFiled: May 28, 1981Date of Patent: March 29, 1983Assignee: BASF AktiengesellschaftInventors: Hansjoerg Siegle, Hans H. Reich, Horst Autzen, Werner Steck, Werner Loeser, Eckhard Hetzel, Manfred Ohlinger
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Patent number: 4367214Abstract: A process for the manufacture of acicular ferrimagnetic iron oxide by heating iron(III) oxide or iron(III) oxide hydroxide at 220.degree.-460.degree. C. under a water vapor partial pressure of not less than 30 mbar, reducing the resulting product to magnetite by means of hydrogen and/or CO and/or an organic compound which can decompose in the presence of iron oxide, and then oxidizing the magnetite with an oxygen-containing gas to give acicular ferrimagnetic iron oxide of the formula FeO.sub.X, where X is from 1.33 to 1.50.Type: GrantFiled: July 31, 1980Date of Patent: January 4, 1983Assignee: BASF AktiengesellschaftInventors: Wilhelm Sarnecki, Laszlo Marosi, Horst Autzen, Manfred Ohlinger, Werner Steck
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Patent number: 4362708Abstract: A process for the preparation of acicular gamma-iron(III) oxide of high coercive force by reducing acicular iron(III) oxide hydroxide, as it is being passed continuously through a furnace having two or more heating zones at from 190.degree. to 700.degree. C., by means of a gas mixture which is produced by passing a stream of inert gas, heated to above 250.degree. C., through an organic substance also heated to above 250.degree. C. in a vessel, and, on introduction into the furnace, is first brought into contact with the .alpha.-iron(III) oxide formed from the iron(III) oxide hydroxide by elimination of water in the first heating zone of the furnace at from 190.degree. to 250.degree. C., the .alpha.-iron(III) oxide thereby being converted to magnetite which is subsequently oxidized with an oxygen-containing gas at from 150.degree. to 400.degree. C., to give gamma-iron(III) oxide.Type: GrantFiled: November 10, 1981Date of Patent: December 7, 1982Assignee: BASF AktiengesellschaftInventors: Manfred Ohlinger, Hans Reichert, Guenter Vaeth, Friedrich R. Faulhaber, Horst Autzen, Peter Rudolf, Joachim Werther